Document And Entity Information
Note To Financial Statement Details Textual
Interest expense
Interest expense
statementsignificantaccountingpoliciespolicies
statementnote1basisandorganizationtables
statementnote3supplementalbalancesheetinformationinthousandstables
statementnote4creditfacilitiestables
statementnote5incometaxestables
SBS [Member]
Represents the SPAR Business Services, Inc.
statementnote6commitmentsandcontingenciestables
Segment Reporting Disclosure [Text Block]
statementnote10relatedpartytransactionstables
Consolidation, Policy [Policy Text Block]
statementnote11stockbasedcompensationtables
statementnote12segmentinformationtables
SBS And SAS [Member]
The total of both SPAR Business and SPAR Administrative services.
statementnote13purchaseandsaleofinterestsinsubsidiariestables
us-gaap_ValuationAllowancesAndReservesBalance
Allowance for doubtful accounts
Allowance for doubtful accounts
Cost Plus Fees [Member]
The percentage markup of the cost plus fees.
statementnote14netincomepersharetables
statementscheduleiivaluationandqualifyingaccountstables
statementnote1basisofpresentationpercentageofthecompanysequityownershipdetails
NRS [Member]
National Retail Source, LLC.
statementnote3supplementalbalancesheetinformationinthousandsaccountsreceivabledetails
Deductions, Allowance for doubtful accounts
Mr. Mason [Member]
Represents Mr.Mason, an officer and director and a shareholder of Merhold Property Trust ("MPT").
statementnote3supplementalbalancesheetinformationinthousandspropertyandequipmentdetails
Mr. Brian Mason Mr. Garry Bristow And Mr. Adrian Wingfield [Member]
Related parties.
statementnote3supplementalbalancesheetinformationinthousandsgoodwillrollforwarddetails
Recovered from/charged to costs and expenses
NDS [Member]
Consolidated international subsidiary.
statementnote3supplementalbalancesheetinformationinthousandsintangibleassetsdetails
statementnote3supplementalbalancesheetinformationinthousandsannualamortizationexpensedetails
statementnote3supplementalbalancesheetinformationinthousandsaccruedexpensesandothercurrentliabilitiesdetails
Mr And Ms Yilmaz [Member]
Related parties.
statementnote4creditfacilitiessummaryofcreditandotherdebtfacilitiesdetails
statementnote4creditfacilitiesunusedavailabilitydetails
statementnote5incometaxesincomebeforeincometaxesdetails
statementnote5incometaxesincometaxbenefitdetails
Field Merchandiser Services SBS [Member]
Net cost of field merchandiser services (SBS).
statementnote5incometaxesincometaxesreconciliationdetails
statementnote5incometaxesdeferredtaxassetsandliabilitiesdetails
statementnote5incometaxesreconciliationofthebeginningandendingamountofunrecognizedtaxbenefitsdetails
statementnote5incometaxestaxreservesdetails
statementnote6commitmentsandcontingenciesfutureminimumcommitmentsundernoncancelableoperatingleasearrangementsdetails
Office And Vehicle Rental MPT [Member]
Represents the office and vehicle rental service provided by affiliate.
us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Lessee Leasing Arrangements, Operating Leases, Term of Contract
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Thereafter
statementnote10relatedpartytransactionstransactionsbetweenthecompanyandaffiliatesdetails
Field Management Services NDS Tanitim [Member]
Field management services provided by the company's affiliate NDS Tanitim.
statementnote11stockbasedcompensationvaluationassumptionsdetails
Vehicle Rental MCPT [Member]
Vehicle rental service provided by the company's affiliate MCPT.
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2020
statementnote11stockbasedcompensationstockoptionactivitydetails
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2021
Field Merchandiser Services NDS Reklam [Member]
Field merchandiser services provided by the company's affiliate NDS Reklam.
statementnote11stockbasedcompensationrestrictedstockactivitydetails
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Pension and Other Postretirement Benefits Disclosure [Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2018
statementnote12segmentinformationsegmentreportinginformationdetails
Valuation Allowances and Reserves [Domain]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2019
statementnote12segmentinformationassetsdetails
statementnote12segmentinformationgeographicdatadetails
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2017
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
statementnote12segmentinformationlonglivedassetsdetails
Valuation Allowances and Reserves Type [Axis]
statementnote13purchaseofinterestsinsubsidiariesassetsandliabilitiesacquireddetails
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
statementnote13purchaseofinterestsinsubsidiariesconsolidatedstatementofincomeproformadetails
statementnote14netincomepersharebasicanddilutedearningspersharedetails
statementscheduleiivaluationandqualifyingaccountsvaluationandqualifyingaccountsdetails
Notes To Financial Statements
Notes To Financial Statements [Abstract]
us-gaap_ConcentrationRiskPercentage1
% of consolidated net revenue
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss attributable to SPAR Group, Inc.
Purchase of treasury shares (in shares)
Treasury Stock, Shares, Acquired
Warehouse Rental (JFMD) [Member]
Represents the service of the warehouse rental (JFMD).
Reissued treasury shares – RSUs (in shares)
Preferred stock, shares outstanding (in shares)
Preferred Stock, Shares Outstanding
Schedule of Finite-Lived Intangible Assets [Table Text Block]
NM Acquisition [Member]
The business acquisition of New Momentum Ltda., a Brazilian Limitada, and New Momentum Servicos Temporarios Ltda., a Brazilian Limitada (each a "NM Company").
SPAR BSMT [Member]
Represents the SPAR Brasil Servicos de Merchandising e Technolgia S.A.
sgrp_OperatingLeaseMonthlyRent
Operating Lease, Monthly Rent
Amount of the monthly rent required for operating lease.
Cash and cash equivalents
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
SGRP Holdings [Member]
Represents the limited liability company of SGRP Brasil Participacoes Ltda.
Sublease Agreement [Member]
The agreement for the use of certain existing office space by SPAR BSMT and each of the NM companies.
sgrp_RelatedPartyTransactionReimbursementOfLegalExpensesFromTransactionWithRelatedParty
Related Party Transaction, Reimbursement of Legal Expenses from Transaction with Related Party
The amount of legal expenses reimbursed by the company to the related party.
us-gaap_AllocatedShareBasedCompensationExpense
Allocated Share-based Compensation Expense
sgrp_NumberOfDirectors
Number of Directors
The number of directors under an agreement.
EILLC [Member]
Represents the Earth Invesments, LLC, a Nevada limited liability company, ("EILLC").
us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Accrued expenses, other current liabilities and customer incentives and deposits
JV Agreement [Member]
An agreement to provide for the NM acquisition for the capitalization of and loans to SPAR BSMT and fund its working capital.
JKC [Member]
Represents JK Consultoria Empersarial Ltda. ("JKC").
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets
Reconciliation Of Long Lived Assets From Segments To Consolidated [Table Text Block]
Information pertaining to the reconciliation of long lived assets from segments to consolidated.
Loan Agreement [Member]
An agreement established between JKC and SGRP Holdings.
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other assets
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Prepaid expenses and other current assets
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred taxes
us-gaap_DeferredTaxAssetsOther
Other
Allowance for Doubtful Accounts [Member]
us-gaap_DeferredTaxAssetsDeferredIncome
Deferred revenue
us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Depreciation
us-gaap_TreasuryStockValueAcquiredCostMethod
Purchase of treasury shares
us-gaap_TreasuryStockValue
Treasury stock, at cost 37,877 shares – December 31, 2016 and 119,695 shares – December 31, 2015
Reissued treasury shares – RSUs
Net revenues
Revenue, Net
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable, net
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Allowance for doubtful accounts and other receivable
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Share-based compensation expense
Exercise of stock options (in shares)
Exercised/cancelled, covered shares (in shares)
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Federal Alternative Minimum Tax
Exercise of stock options
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Federal Research and Development Credit
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Net operating loss carry forwards
us-gaap_AllowanceForDoubtfulAccountsReceivable
Allowance for Doubtful Accounts Receivable
Foreign Currency Transactions and Translations Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Foreign subsidiaries
us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Share-based compensation
Earnings Per Share, Policy [Policy Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Granted Shares (in shares)
Income Tax, Policy [Policy Text Block]
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Goodwill
Internal Use Software, Policy [Policy Text Block]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and equity
us-gaap_UndistributedEarningsOfForeignSubsidiaries
Undistributed Earnings of Foreign Subsidiaries
us-gaap_DeferredTaxLiabilitiesDeferredExpenseCapitalizedResearchAndDevelopmentCosts
Capitalized software development costs
Retained earnings
Accumulated other comprehensive loss
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]
Loan From SGRP Holdings on Behalf of EILLC [Member]
Represents the loan from SGRP Holdings on behalf of the subsidiary EILLC.
SPAR BSMT Joint Venture [Member]
Represents the joint venture of SPAR BSMT.
Brazil Acquisition [Member]
Represents the transactions associated with the Brazil Acquisition.
SGRP Holdings and SPAR BSMT [Member]
Represents the purchasers of SGRP Holdings and SPAR BSMT.
sgrp_BusinessAcquisitionNumberOfAcquiredEntity
Business Acquisition, Number of Acquired Entity
The number of acquired entity in a business acquisition.
Deferred tax liabilities:
NMS LLC [Member]
Information pertaining to the subsidiary, NMS, LLC.
C M R Meridien [Member]
C m r meridien member.
us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
AUSTRALIA
Equity Ownership Of Subsidiaries [Table Text Block]
Equity ownership of subsidiaries table text block.
Sterling Credit Facility [Member]
Sterling credit facility member.
Oxford Funding Pty Ltd [Member]
Oxford funding pty ltd member.
Mizuho Bank [Member]
Mizuho bank member.
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
Changes in operating assets and liabilities, net of business acquisitions and disposition:
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State
BRAZIL
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
sgrp_PercentOfServiceProvidedByRelatedParty
Percent Of Service Provided By Related Party
Percent of service provided by related party.
Domestic Merchandising Specialists Field Force [Member]
Represents information pertaining to domestic merchandising specialists field force.
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
CANADA
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal
Plus2 Compensation [Member]
Plus2 compensation member.
us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
Deferred income taxes
sgrp_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsTerm
Share Based Compensation Arrangement By Share Based Payment Award Options Term
Share based compensation arrangement by share based payment award options term.
CHINA
Deferred income tax benefit
International [Member]
International member.
Unbilled [Member]
Unbilled member.
Non-Trade [Member]
Non trade member.
Schedule Of Property Plant And Equipment [Table Text Block]
Schedule of property plant and equipment table text block.
Share based compensation
Other assets
Treasury stock, shares (in shares)
Treasury Stock, Shares
Revenue Recognition, Policy [Policy Text Block]
Common stock, $.01 par value: Authorized shares - 47,000,000, Issued shares – 20,680,717 – December 31, 2016 and December 31, 2015
us-gaap_TableTextBlock
Notes Tables
us-gaap_DepreciationAmortizationAndAccretionNet
Depreciation, Amortization and Accretion, Net
Common stock, shares issued (in shares)
Common stock, shares authorized (in shares)
Amendment Flag
us-gaap_DepreciationDepletionAndAmortization
Depreciation and amortization
Common stock, par value (in dollars per share)
us-gaap_AssetsCurrent
Total current assets
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
INDIA
us-gaap_OtherNonoperatingIncomeExpense
Other income, net
Other income, net
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Deferred income taxes
Preferred stock, $.01 par value: Authorized and available shares– 2,445,598 Issued and outstanding shares– None – December 31, 2016 and None – December 31, 2015
State and Local Jurisdiction [Member]
Income Tax Authority [Domain]
Current Fiscal Year End Date
Income Tax Authority [Axis]
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued
Expected forfeiture rate
The expected forfeiture rate assumption that is used in valuing an option on its own shares.
JAPAN
Adjustments to reconcile net income to net cash provided by operating activities
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized
Document Fiscal Period Focus
Document Fiscal Year Focus
us-gaap_PreferredStockConversionBasis
Preferred Stock, Conversion Basis
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share
Document Period End Date
Credit And Debt Facilities Unused Availability [Table Text Block]
Credit and debt facilities unused availability table text block.
Document Type
us-gaap_OpenTaxYear
Open Tax Year
Statement of Cash Flows [Abstract]
us-gaap_OperatingIncomeLoss
Operating income
Operating income (loss)
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Unrecognized tax benefits
Unrecognized tax benefits
us-gaap_GrossProfit
Gross profit
Statement of Stockholders' Equity [Abstract]
Document Information [Line Items]
Cost of revenues
Document Information [Table]
Interest paid
Schedule Of Tax Reserves [Table Text Block]
Schedule of tax reserves table text block.
Income taxes paid
Entity Public Float
Entity Filer Category
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life
Entity Current Reporting Status
us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Total
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Thereafter
us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Additions for tax provisions of prior years
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2020
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
2021
us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
Employee Stock Purchase Plan [Member]
Employee stock purchase plan member.
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2018
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2019
sgrp_CommonStockForConversion
Common Stock For Conversion
Common stock for conversion.
us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2017
Furniture and Fixtures [Member]
us-gaap_PreferredStockDividendRatePercentage
Preferred Stock, Dividend Rate, Percentage
Earliest Tax Year [Member]
Domestic Field Management [Member]
Represents information pertaining to domestic field management.
Non-controlling interest
Leaseholds and Leasehold Improvements [Member]
Entity Central Index Key
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2018
Entity Registrant Name
Entity [Domain]
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2017
MEXICO
Tax Period [Axis]
Legal Entity [Axis]
Business Acquisition, Acquiree [Domain]
Tax Period [Domain]
I S O Granted To Greater Than10 Percent Stockholders [Member]
I s o granted to greater than10 percent stockholders member.
The 2008 Plan [Member]
The issuance of shares of common stock to SGRP, represented as the 2008 Stock Compensation Plan ("2008 Plan").
Summary of Income Tax Contingencies [Table Text Block]
Business Acquisition [Axis]
sgrp_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPercent
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Percent
Share based compensation arrangement by share based payment award award vesting percent.
BBVA Bancomer Bank [Member]
The legal entity BBVA Bancomer Bank.
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Policy [Policy Text Block]
Additional paid-in capital
Interbank Interest Rate [Member]
The variable interest rate TIIE (Interbank Interest Rate).
Net Working Capital, net of cash
The amount of working capital, net of cash, recognized as of the acquisition date.
Entity Common Stock, Shares Outstanding (in shares)
Operating activities
Intangible Assets
The amount of non-operating assets recognized as of the acquisition date.
Tax Credit Carryforward, Name [Domain]
Statement [Line Items]
Tax Credit Carryforward [Axis]
Accounts receivable, net
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Trading Symbol
AOCI Attributable to Parent [Member]
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Net expense, rate
us-gaap_AccountsReceivableNetCurrent
Accounts Receivable, net
us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Foreign tax rate differential (benefit), rate
us-gaap_AccountsReceivableGrossCurrent
Accounts receivable
us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Less allowance for doubtful accounts
us-gaap_Liabilities
Total liabilities
Commitments and contingencies – See Note 6
Accounting Standards Update 2015-17 [Member]
Current assets:
us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Net change in cash and cash equivalents
Effect of foreign exchange rate changes on cash
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net cash provided by (used in) financing activities
us-gaap_TaxesPayableCurrentAndNoncurrent
Taxes Payable
us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Net cash provided by operating activities
us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Net cash used in investing activities
us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Permanent differences, rate
TURKEY
us-gaap_PaymentsOfDistributionsToAffiliates
Distribution to non-controlling investors
UNITED STATES
Net Fair Value of Assets Acquired
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Assumed Liabilities
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Federal Research and Development Credit, rate
us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
State income taxes, net of federal benefit, rate
us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Return to provision (benefit), rate
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Provision for income taxes at federal statutory rate, rate
us-gaap_IncomeTaxReconciliationOtherAdjustments
Foreign tax rate differential (benefit)
Noncontrolling Interest [Member]
SOUTH AFRICA
us-gaap_PaymentsForRepurchaseOfCommonStock
Purchase of treasury shares
us-gaap_StockholdersEquity
Total SPAR Group, Inc. equity
Retained Earnings [Member]
Proceeds from stock options exercised
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Fixed Assets
Common Stock [Member]
Equity Components [Axis]
Equity Component [Domain]
Expected dividend yields
Risk free interest rate
us-gaap_IncomeTaxReconciliationNondeductibleExpense
Permanent differences
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Cash
Expected volatility
us-gaap_LoansPayable
Loans Payable
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Expected term (in years) (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Foreign currency translation adjustments
us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Federal Research and Development Credit
us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Return to provision (benefit)
us-gaap_LineOfCredit
Long-term Line of Credit
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Provision for income taxes at federal statutory rate
us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Business Acquisition, Percentage of Voting Interests Acquired
us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
State income taxes, net of federal benefit
us-gaap_OtherComprehensiveIncomeLossNetOfTax
Other comprehensive loss
Receivables, Policy [Policy Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)
Weighted-Average Grant Date Fair Value per Share, Unvested (in dollars per share)
Cash and Cash Equivalents, Policy [Policy Text Block]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Foreign
Weighted-Average Grant Date Fair Value per Share, Granted (in dollars per share)
Weighted-Average Grant Date Fair Value per Share, Vested (in dollars per share)
Significant Accounting Policies [Text Block]
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total equity
Balance
Balance
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Unvested shares (in shares)
Unvested shares (in shares)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Domestic
Income Tax Disclosure [Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Forfeited shares (in shares)
Accounting Policies [Abstract]
Granted shares (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested shares (in shares)
Equipment [Member]
us-gaap_IncomeLossIncludingPortionAttributableToNoncontrollingInterest
Income before income tax expense
Total:
sgrp_PreferredStockNumberOfAuthorizedSharesRemaining
Preferred Stock Number Of Authorized Shares Remaining
The number of shares of preferred stock that remain available for issuance out of the total number of shares authorized by the company's charter.
us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Software Development [Member]
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
Exercisable at December 31, 2016
us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Mr. Wingfield [Member]
Related party of the company.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Exercisable at December 31, 2016 (in dollars per share)
Mr. Bristow [Member]
Related party of the compnay.
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
Exercisable at December 31, 2016 (Year)
Business Acquisition, Pro Forma Information [Table Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Exercisable at December 31, 2016 (in shares)
Field Merchandiser Services NRS [Member]
Service provided by NRS, an affiliate of the company.
Exercised/ cancelled, aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Aggregate Intrinsic Value
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Office And Vehicle Rental MHT [Member]
Services provided by MHT, an affiliate of the company.
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Weighted- Average Remaining Contractual Term (Year)
Revolving Credit Facility [Member]
Credit Facility [Domain]
Credit Facility [Axis]
Trade Accounts Receivable [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted- Average Exercise Price (in dollars per share)
Weighted- Average Exercise Price (in dollars per share)
Receivable Type [Axis]
Receivable [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Forfeited or expired, weighted-average exercise price (in dollars per share)
us-gaap_ProceedsFromRelatedPartyDebt
Proceeds from Related Party Debt
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Granted, weighted-average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Exercised/cancelled, weighted-average exercise price (in dollars per share)
Proceeds from local investors in Brazil
The amount of cash received from investors.
Maximum [Member]
Minimum [Member]
Range [Axis]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Range [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Covered Shares (in shares)
Covered Shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Forfeited or expired, covered shares (in shares)
Lease Arrangement, Type [Domain]
Lease Arrangement, Type [Axis]
Schedule of Goodwill [Table Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Supplemental Balance Sheet Disclosures [Text Block]
us-gaap_RepaymentsOfNotesPayable
Payments on term debt
Treasury Stock [Text Block]
Due to affiliates
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Preferred Stock [Text Block]
us-gaap_EquityMethodInvestmentOwnershipPercentage
Equity Method Investment, Ownership Percentage
Assistance Provided in Connection to Brazilian Acquisition [Member]
Represents the amount of assistance provided by SIT in connection with the Brazilian Acquisition.
Local Investors in Australia [Member]
Information pertaining to local invested in Australia.
SPAR InfoTech, Inc. [Member]
Represents SPAR InfoTech, Inc. ("SIT"), a Nevada corporation and affiliate of SGRP.
Products and Services [Domain]
Local Investors in China [Member]
Information pertaining to local investors in China.
SPAR Todopromo [Member]
SPAR Todopromo, a consolidated international subsidiary of the Company.
Customer incentives and deposits
Loans Due to Affiliates [Member]
Information pertaining to loans that are due to affiliates.
Consulting and Administrative Services (CON) [Member]
Consulting and administrative services provided by the company's affiliate CON.
Local Investors in Mexico [Member]
Information pertaining to local investors in Mexico.
CON [Member]
CONAPAD which supplies administrative and operational consulting to SPAR Todopromo beginning in 2015.
Products and Services [Axis]
Local Investors in Brazil [Member]
Information pertaining to local investors in Brazil.
Accrued Expenses Due to Affiliates [Member]
Information pertaining to accrued expenses that are due to affiliates.
Other comprehensive loss:
Plan Name [Axis]
Plan Name [Domain]
Net borrowing (payments) on lines of credit
Customer Relationships [Member]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Weighted average common shares – diluted (in shares)
Shares used in diluted net income per share calculations (in shares)
Services provided by affiliates
Related Party Transaction, Expenses from Transactions with Related Party
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Second Subsidiary Acquired March 2010 [Member]
Represents the second subsidiary acquired March 2010.
Mr. Juan F. Medina Domenzain [Member]
Mr. Juan F. Medina Domenzain, officer and director of SPAR Todopromo and also majority shareholder of CONAPAD ("CON").
Computer Software, Intangible Asset [Member]
Award Type [Axis]
Geographical [Axis]
Deferred tax assets:
us-gaap_BusinessCombinationContingentConsiderationLiability
Contingent liabilities, incentive for consulting fees
sgrp_OperatingLossCarryforwardsLimitationOnUseAmount
Operating Loss Carryforwards Limitation on Use Amount
The maximum extent to which the reporting entity can use its operating loss carryforwards on an annual basis.
Equity Award [Domain]
Geographical [Domain]
sgrp_EffectiveIncomeTaxRateReconciliationStateTaxReserveReductionAmount
Other (benefit)
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the state tax reserve reductions.
us-gaap_RelatedPartyTransactionRate
Related Party Transaction, Rate
us-gaap_RelatedPartyTransactionAmountsOfTransaction
Related Party Transaction, Amounts of Transaction
sgrp_EffectiveIncomeTaxRateReconciliationStateTaxReserveReductionPercent
Other (benefit), rate
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state tax reserve reduction.
Finite-Lived Intangible Assets by Major Class [Axis]
Purchase Agreement [Member]
Represents the agreement under which parties entered to purchase certain business assets, fixed assets
Related Party Transaction [Axis]
us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Finite-Lived Intangible Assets, Major Class Name [Domain]
Related Party Transaction [Domain]
Diluted income per common share attributable to SPAR Group, Inc.: (in dollars per share)
Diluted net income per common share: (in dollars per share)
Itau Bank [Member]
Represents Itau Bank, a lender of the company.
sgrp_NumberOfNationalRegionalAndDistrictAdministrators
Number of National, Regional, and District Administrators
Number of full-time national, regional, and district administrators.
sgrp_NumberOfMerchandisingSpecialists
Number of Merchandising Specialists
Number of available field merchandising specialists.
Employees and a Director [Member]
Represents the employees and a specific director.
Weighted average common shares – basic (in shares)
Shares used in basic net income per share calculation (in shares)
Scenario, Unspecified [Domain]
sgrp_DebtInstrumentInterestRateMonthly
Debt Instrument, Interest Rate, Monthly
The monthly interest rate of the debt outstanding.
Related Party [Domain]
sgrp_LineOfCreditFacilityUtilizationPercentage
Line of Credit Facility, Utilization, Percentage
The percentage of line of credit amount that has been used.
Scenario [Axis]
ESP Plan [Member]
Represents the ESP Plan.
Related Party [Axis]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
sgrp_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockDiscountRate
Share-based Compensation Arrangement by Share-based Payment Award Purchase Price of Common Stock Discount Rate
Represents information about the discount for employee purchases of Common Stock.
Basic income per common share attributable to SPAR Group, Inc.: (in dollars per share)
Basic net income per common share: (in dollars per share)
Related Party Transactions Disclosure [Text Block]
Bradeso Bank [Member]
Represents Bradeso Bank, a lender of the company.
sgrp_AffiliatePurchasePriceOfCommonStockPercent
Affiliate Purchase Price of Common Stock Percent
Represents information about the purchase price of common stock for affiliate expressed as a percentage of its value.
Schedule of Related Party Transactions [Table Text Block]
CSP Plan [Member]
Represents the CSP Plan.
us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
Distributions to non-controlling investors
sgrp_PercentOfEligibleDomesticAccountsReceivableLessCertainReservesToCalculateBorrowingAvailability
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability
Percent of eligible domestic accounts receivable less certain reserves to calculate borrowing availability.
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
Statement [Table]
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net income attributable to non-controlling interest
Intersegment Eliminations [Member]
Consolidation Items [Axis]
Income Statement [Abstract]
Consolidation Items [Domain]
Financing activities
us-gaap_GoodwillAcquiredDuringPeriod
Purchase of Brazil subsidiary
Accounting Guidance [Domain]
Valuation and Qualifying Accounts Disclosure [Table Text Block]
Tabular disclosure of a schedule of allowance and reserve accounts where the valuation and qualifying accounts are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.
Prospective Adoption of New Accounting Pronouncements [Axis]
Business Combination Disclosure [Text Block]
us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive income attributable to non-controlling interest
sgrp_PaymentsForRelatedPartyServices
Payments for Related Party Services
The amount of cash paid for domestic related party services.
sgrp_CostPlusFeePercentage
Cost Plus Fee, Percentage
The percentage of cost plus fee charged by a counter party.
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Non-affiliated Third-party Provider [Member]
Represents a non-affiliated third-party provider that provided field merchandising services to the company.
Mr. Mason and Mr. Bristow [Member]
Represents Mr. Mason and Mr. Bristow, related parties of the company.
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Merhold Property Trust [Member]
Represents Merhold Property Trust, a related party of the company.
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Merhold Cape Property Trust [Member]
Represents Merhold Cape Property Trust, a related party of the company.
Legal Services (KMSA) [Member]
Represents the legal service provided by KMSA.
Title of Individual [Axis]
Relationship to Entity [Domain]
us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Purchase of Brazil subsidiary
Net income
Net income
Net income
Field Administration Expenses SAS [Member]
Net cost of field administration expenses(SAS).
Long-term debt
us-gaap_LongTermLoansPayable
Loans Payable, Noncurrent
Income tax expense
Net expense
Net expense
Merhold Holding Trust [Member]
Entity owned by related parties.
Series A Preferred Stock [Member]
us-gaap_LiabilitiesCurrent
Total current liabilities
Accrued expenses and other current liabilities
Accrued expenses and other current liabilities
Class of Stock [Axis]
Class of Stock [Domain]
us-gaap_LiabilityForUncertainTaxPositionsCurrent
Uncertain tax position reserves
Deferred income taxes
us-gaap_DeferredTaxLiabilitiesCurrent
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
sgrp_PaymentsToAquireProductiveAssetsExcludingForeignExchange
Total Capital expenditures
The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets, excluding foreign exchange.
Lines of credit and short-term loans
Counterparty Name [Domain]
us-gaap_LoansPayableCurrent
Loans Payable, Current
Counterparty Name [Axis]
Schedule of Debt [Table Text Block]
us-gaap_DebtInstrumentPeriodicPayment
Debt Instrument, Periodic Payment
sgrp_LineOfCreditFacilityCovenantTermsMinimumConsolidatedTangibleNetWorth
Line of Credit Facility, Covenant Terms, Minimum Consolidated Tangible Net Worth
Represents the minimum consolidated tangible net worth under the credit facility.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
sgrp_LineOfCreditFacilityCovenantTermsMinimumTangibleNetWorth
Line of Credit Facility, Covenant Terms, Minimum Tangible Net Worth
Represents the minimum tangible net worth under the credit facility.
sgrp_LineOfCreditFacilityCovenantTermsPercentOfIncreaseInNetProfit
Line of Credit Facility, Covenant Terms, Percent of Increase in Net Profit
Represents the percentage of increase in combined and consolidated net profit from covenant terms under the credit facility.
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
sgrp_LineOfCreditFacilityCovenantTermsMaximumIndebtednessToTangibleNetWorthRatio
Line of Credit Facility, Covenant Terms, Maximum Indebtedness to Tangible Net Worth Ratio
Represents the maximum indebtedness to tangible net work ratio from covenant terms under the credit facility.
sgrp_LineOfCreditFacilityCovenantTermsMaximumCapitalExpenditures
Line of Credit Facility, Covenant Terms, Maximum Capital Expenditures
Represents the maximum capital expenditures from covenant terms under the credit facility.
sgrp_LineOfCreditFacilityCovenantTermsMinimumFixedChargeCoverageRatio
Line of Credit Facility, Covenant Terms, Minimum Fixed Charge Coverage Ratio
Represents the minimum fixed charge coverage ratio from covenant terms under the credit facility.
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
us-gaap_DefinedBenefitPlanContributionsByEmployer
Defined Benefit Plan, Contributions by Employer
us-gaap_TaxesPayableCurrent
Taxes payable
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Accounts payable
us-gaap_LeaseAndRentalExpense
Operating Leases, Rent Expense
Subsequent Event [Member]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Supplemental disclosure of cash flows information
us-gaap_AccruedSalariesCurrent
Accrued salaries and wages
Prime Rate [Member]
us-gaap_OtherAccruedLiabilitiesCurrent
Other
Variable Rate [Axis]
Variable Rate [Domain]
us-gaap_CapitalizedComputerSoftwareAmortization1
Capitalized Computer Software, Amortization
us-gaap_PaymentsToAcquireProductiveAssets
Purchases of property and equipment and capitalized software
us-gaap_AccruedProfessionalFeesCurrent
Accrued accounting and legal expenses
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Liabilities and equity
us-gaap_Assets
Total assets
Assets
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Stock options and unvested restricted shares (in shares)
us-gaap_GoodwillImpairmentLoss
Change in goodwill
us-gaap_SharesIssued
Shares (in shares)
Shares (in shares)
us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Line of Credit Facility, Interest Rate at Period End
us-gaap_DepreciationAndAmortization
Depreciation and amortization
Unused Availability
us-gaap_AmortizationOfIntangibleAssets
Amortization of Intangible Assets
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
us-gaap_VariableInterestEntityOwnershipPercentage
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Intangible assets, net
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Less accumulated amortization
us-gaap_FiniteLivedIntangibleAssetsNet
Total
us-gaap_FiniteLivedIntangibleAssetsGross
Customer contracts and lists
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Net income attributable to SPAR Group, Inc.
Net income attributable to SPAR Group, Inc.
Net income attributable to SPAR Group, Inc.
us-gaap_CapitalizedComputerSoftwareGross
Capitalized Computer Software, Gross
us-gaap_IncomeLossFromContinuingOperations
Net income (loss) from continuing operations
Lender Name [Axis]
Variable Interest Entities [Axis]
Line of Credit Facility, Lender [Domain]
Variable Interest Entity, Classification [Domain]
Restricted Stock Units (RSUs) [Member]
Goodwill
Balance
Balance
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less accumulated depreciation and amortization
Restricted Stock [Member]
Property and equipment, net
Employee Stock Option [Member]
us-gaap_PropertyPlantAndEquipmentGross
Property and equipment
us-gaap_NoncurrentAssets
Long lived assets
Debt Disclosure [Text Block]
Selling, general and administrative expense
Bad debt expense, net of recoveries
Provision for Doubtful Accounts
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Reconciliation of Assets from Segment to Consolidated [Table Text Block]
sgrp_MajorityInterestOwnershipPercentageByParent
Majority Interest Ownership Percentage By Parent
The parent entity's majority interest in net assets of the subsidiary, expressed as a percentage.
sgrp_NumberOfVehiclesSubleased
Number Of Vehicles Subleased
Represents number of vehicles subleased.
sgrp_RelatedPartyOwnershipPercentage
Related Party Ownership Percentage
Percentage of ownership by a related person in a related entity.
sgrp_NumberOfVehiclesLeased
Number Of Vehicles Leased
Represents number of vehicles leased under lease arrangement.
PY Restricted Stock [Member]
Information pertaining to PY restricted stock.
Use of Estimates, Policy [Policy Text Block]
Investing activities
New Accounting Pronouncements, Policy [Policy Text Block]
CY Restricted Stock [Member]
Information pertaining to CY restricted stock.
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Reclassification, Policy [Policy Text Block]
Earnings Per Share [Text Block]
us-gaap_PriorPeriodReclassificationAdjustment
Prior Period Reclassification Adjustment
Schedule of Segment Reporting Information, by Segment [Table Text Block]