Document And Entity Information Note To Financial Statement Details Textual statementsignificantaccountingpoliciespolicies us-gaap_VariableInterestEntityOwnershipPercentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage statementnote2correctionofpriorperiodfinancialstatementstables statementnote4earningspersharetables statementnote5creditfacilitiestables Type of Adoption [Domain] statementnote6relatedpartytransactionstables us-gaap_PaymentsOfDistributionsToAffiliates Distribution to non-controlling investors SBS [Member] Represents the SPAR Business Services, Inc. Adjustments for New Accounting Pronouncements [Axis] statementnote10segmentinformationtables Variable Rate [Domain] statementnote11purchaseofinterestsinsubsidiariestables Variable Rate [Axis] statementnote13capitalleaseobligationstables Prime Rate [Member] statementnote2correctionofpriorperiodfinancialstatementsadjustmentstopriorperiodfinancialsdetails SBS And SAS [Member] The total of both SPAR Business and SPAR Administrative services. statementnote4earningspersharebasicanddilutedearningspersharedetails Cost Plus Fees [Member] The percentage markup of the cost plus fees. statementnote5creditfacilitiessummaryofcreditandotherdebtfacilitiesdetails statementnote5creditfacilitiesunusedavailabilitydetails statementnote6relatedpartytransactionstransactionsbetweenthecompanyandaffiliatesdetails NRS [Member] National Retail Source, LLC. statementnote10segmentinformationsegmentreportinginformationdetails Mr. Mason [Member] Represents Mr.Mason, an officer and director and a shareholder of Merhold Property Trust ("MPT"). statementnote10segmentinformationassetsdetails Mr. Brian Mason Mr. Garry Bristow And Mr. Adrian Wingfield [Member] Related parties. statementnote10segmentinformationgeographicdatadetails NDS [Member] Consolidated international subsidiary. us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo 2018 statementnote10segmentinformationlonglivedassetsdetails statementnote11purchaseofinterestsinsubsidiariesassetsandliabilitiesacquireddetails us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths 2017 Variable Interest Entities [Axis] statementnote11purchaseofinterestsinsubsidiariesconsolidatedstatementofincomeproformadetails Mr And Ms Yilmaz [Member] Related parties. statementnote13capitalleaseobligationscapitalleaseassetsbalancesdetails us-gaap_LoansPayable Loans Payable statementnote13capitalleaseobligationsfutureminimumleasepaymentsdetails Variable Interest Entity, Classification [Domain] Notes To Financial Statements Noncontrolling Interest [Member] Field Merchandiser Services SBS [Member] Net cost of field merchandiser services (SBS). Notes To Financial Statements [Abstract] Office And Vehicle Rental MPT [Member] Represents the office and vehicle rental service provided by affiliate. Vehicle Rental MCPT [Member] Vehicle rental service provided by the company's affiliate MCPT. Retained Earnings [Member] us-gaap_LineOfCredit Long-term Line of Credit Additional Paid-in Capital [Member] Investing activities Proceeds from stock options exercised Treasury Stock [Member] Lease Arrangement, Type [Axis] Equity Component [Domain] 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. Lease Arrangement, Type [Domain] Common Stock [Member] Report Date [Axis] Mr. Wingfield [Member] Related party of the company. Equity Components [Axis] Financial Statement Filing Date [Domain] Mr. Bristow [Member] Related party of the compnay. Office And Vehicle Rental MHT [Member] Services provided by MHT, an affiliate of the company. Warehouse Rental (JFMD) [Member] Represents the service of the warehouse rental (JFMD). Comprehensive loss attributable to SPAR Group, Inc. Comprehensive loss attributable to SPAR Group, Inc. us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd Line of Credit Facility, Interest Rate at Period End us-gaap_ShortTermBorrowings Short-term Debt 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"). Unused Availability SPAR BSMT [Member] Represents the SPAR Brasil Servicos de Merchandising e Technolgia S.A. Purchase of treasury shares (in shares) Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding us-gaap_PriorPeriodReclassificationAdjustment Prior Period Reclassification Adjustment us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Preferred Stock [Text Block] sgrp_OperatingLeaseMonthlyRent Operating Lease, Monthly Rent Amount of the monthly rent required for operating lease. us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity SGRP Holdings [Member] Represents the limited liability company of SGRP Brasil Participacoes Ltda. Reissued treasury shares – RSU's (in shares) New Accounting Pronouncements, Policy [Policy Text Block] Sublease Agreement [Member] The agreement for the use of certain existing office space by SPAR BSMT and each of the NM companies. Related Party Transaction [Domain] Related Party Transaction [Axis] us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount us-gaap_IncreaseDecreaseInAccountsPayable Accounts payable Weighted average common shares – basic and diluted (in shares) Weighted average shares used in basic and diluted net income per share calculation (in shares) Basic and diluted loss per common share: (in dollars per share) Basic and diluted net loss per common share (in dollars per share) 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. Net Fair Value of Assets Acquired us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities Assumed Liabilities Line of Credit Facility, Lender [Domain] Related Party [Axis] EILLC [Member] Represents the Earth Invesments, LLC, a Nevada limited liability company, ("EILLC"). Lender Name [Axis] Related Party [Domain] JKC [Member] Represents JK Consultoria Empersarial Ltda. ("JKC"). Net revenues Revenue, Net 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. Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Restatement Adjustment [Member] Scenario, Previously Reported [Member] us-gaap_NumberOfCountriesInWhichEntityOperates Number of Countries in which Entity Operates Fixed Assets Scenario, Unspecified [Domain] Adjustments for Error Corrections [Axis] Scenario [Axis] Adjustments for Error Correction [Domain] Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Debt Disclosure [Text Block] us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 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. us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders Distributions to non-controlling investors SPAR InfoTech, Inc. [Member] Represents SPAR InfoTech, Inc. ("SIT"), a Nevada corporation and affiliate of SGRP. Local Investors in China [Member] Information pertaining to local investors in China. us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents Cash 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. 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 income (loss): % of consolidated net revenue Consolidation Items [Domain] us-gaap_BusinessCombinationConsiderationTransferred1 Business Combination, Consideration Transferred Consolidation Items [Axis] us-gaap_TreasuryStockValueAcquiredCostMethod Purchase of treasury shares Intersegment Eliminations [Member] Mr. Juan F. Medina Domenzain [Member] Mr. Juan F. Medina Domenzain, officer and director of SPAR Todopromo and also majority shareholder of CONAPAD ("CON"). us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities Accrued expenses, other current liabilities and customer incentives and deposits us-gaap_NetIncomeLossAttributableToNoncontrollingInterest Net income attributable to non-controlling interest Net income attributable to non-controlling interest us-gaap_TreasuryStockValue Treasury stock, at cost 24,877 shares – March 31, 2017 and 37,877 shares – December 31, 2016 Significant Accounting Policies [Text Block] Accounting Policies [Abstract] us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired Business Acquisition, Percentage of Voting Interests Acquired Relationship to Entity [Domain] Statement of Financial Position [Abstract] Title of Individual [Axis] us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other assets 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. Reissued treasury shares – RSU's sgrp_DebtInstrumentInterestRateMonthly Debt Instrument, Interest Rate, Monthly The monthly interest rate of the debt outstanding. us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest Comprehensive (loss) income attributable to non-controlling interest Comprehensive (loss) income attributable to non-controlling interest us-gaap_SharesIssued Shares (in shares) Shares (in shares) Bradeso Bank [Member] Represents Bradeso Bank, a lender of the company. Statement of Cash Flows [Abstract] us-gaap_RepaymentsOfNotesPayable Payments on term debt Statement of Stockholders' Equity [Abstract] 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. Business combination, pro forma information, revenue of acquiree since acquisition date, actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Business Acquisition, Pro Forma Information [Table Text Block] us-gaap_AllocatedShareBasedCompensationExpense Allocated Share-based Compensation Expense Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Nature of Operations [Text Block] Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Products and Services [Domain] Products and Services [Axis] Exercise of stock options (in shares) Exercise of stock options us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest Comprehensive income (loss) Net income Net income Net income Net payments on lines of credit us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation Share-based compensation us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Geographical [Domain] Geographical [Axis] us-gaap_InterestIncomeExpenseNonoperatingNet Interest (income) expense Interest expense sgrp_PaymentsForRelatedPartyServices Payments for Related Party Services The amount of cash paid for domestic related party services. us-gaap_NoncurrentAssets Long lived assets us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and equity Income tax expense Income tax expense Retained earnings Mr. Mason and Mr. Bristow [Member] Represents Mr. Mason and Mr. Bristow, related parties of the company. SPAR BSMT Joint Venture [Member] Represents the joint venture of SPAR BSMT. Due to affiliates Merhold Property Trust [Member] Represents Merhold Property Trust, a related party of the company. Accumulated other comprehensive loss Segments [Axis] Brazil Acquisition [Member] Represents the transactions associated with the Brazil Acquisition. Merhold Cape Property Trust [Member] Represents Merhold Cape Property Trust, a related party of the company. SGRP Holdings and SPAR BSMT [Member] Represents the purchasers of SGRP Holdings and SPAR BSMT. Segments [Domain] us-gaap_PolicyTextBlockAbstract Accounting Policies Reconciliation of Assets from Segment to Consolidated [Table Text Block] Legal Services (KMSA) [Member] Represents the legal service provided by KMSA. sgrp_BusinessAcquisitionNumberOfAcquiredEntity Business Acquisition, Number of Acquired Entity The number of acquired entity in a business acquisition. NMS LLC [Member] Information pertaining to the subsidiary, NMS, LLC. C M R Meridien [Member] C m r meridien member. Credit Facility [Domain] Series A Preferred Stock [Member] Statement [Table] Revolving Credit Facility [Member] Field Administration Expenses SAS [Member] Net cost of field administration expenses(SAS). Credit Facility [Axis] AUSTRALIA Income Statement [Abstract] Schedule of Segment Reporting Information, by Segment [Table Text Block] Financing activities Long-term debt and other liabilities us-gaap_NumberOfReportableSegments Number of Reportable Segments Class of Stock [Domain] Sterling Credit Facility [Member] Sterling credit facility member. Class of Stock [Axis] Award Type [Axis] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Oxford Funding Pty Ltd [Member] Oxford funding pty ltd member. Mizuho Bank [Member] Mizuho bank member. Equity Award [Domain] BRAZIL 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. CANADA Segment Reporting Disclosure [Text Block] Merhold Holding Trust [Member] Entity owned by related parties. CHINA Prepaid expenses and other current assets us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Customer incentives and deposits us-gaap_LiabilitiesCurrent Total current liabilities SVP Sales and Marketing [Member] Rank of officer in the entity that oversees the sales and marketing operations and is appointed by the board of directors. Accrued expenses and other current liabilities International [Member] International member. Schedule of Debt [Table Text Block] sgrp_InterestReceivedPaidNet Interest paid The net amount of cash (received) paid for interest. us-gaap_OtherNonoperatingIncomeExpense Other income, net Other income, net December 31, 2016 [Member] Represents December 31, 2016. Reclassification of Deferred Tax Liabilities to Noncurrent Assets [Member] Represents the information pertaining to the reclassification of deferred tax liabilities to noncurrent assets. Changes in operating assets and liabilities, net of business acquisitions and disposition: Accounting Changes and Error Corrections [Text Block] Deferred income taxes sgrp_PaymentsToAquireProductiveAssetsExcludingForeignExchange 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. US Segment [Member] Represents the information pertaining to the United States segment. International Segment [Member] Represents the information pertaining to the international segment. us-gaap_OperatingIncomeLoss Operating income Operating income (loss) Reclassification of Deferred Tax Assets from Current Assets to Noncurrent Assets [Member] Represents the reclassification of deferred tax assets from current assets to noncurrent assets. Cost of revenues Business Combination Disclosure [Text Block] us-gaap_GrossProfit Gross profit Treasury stock, shares (in shares) Amendment Flag sgrp_LineOfCreditFacilityCovenantTermsMinimumConsolidatedTangibleNetWorth Line of Credit Facility, Covenant Terms, Minimum Consolidated Tangible Net Worth Represents the minimum consolidated tangible net worth under the credit facility. Lines of credit and short-term loans sgrp_LineOfCreditFacilityCovenantTermsMinimumTangibleNetWorth Line of Credit Facility, Covenant Terms, Minimum Tangible Net Worth Represents the minimum tangible net worth under the credit facility. Common stock, $.01 par value: Authorized shares – 47,000,000, Issued shares – 20,680,717 – March 31, 2017 and December 31, 2016 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. Commitments and Contingencies Disclosure [Text Block] 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. us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract Lessee, Operating Lease, Term of Contract Common stock, shares authorized (in shares) 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. Common stock, shares issued (in shares) Other assets INDIA Common stock, par value (in dollars per share) Share based compensation Current Fiscal Year End Date Capital Lease Obligations [Member] JAPAN Document Fiscal Period Focus Document Fiscal Year Focus us-gaap_CapitalLeasesFutureMinimumPaymentsDue Document Period End Date Preferred stock, $.01 par value: Authorized and available shares– 2,445,598, Issued and outstanding shares– None – March 31, 2017 and December 31, 2016 Credit And Debt Facilities Unused Availability [Table Text Block] Credit and debt facilities unused availability table text block. Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears 2019 Document Type us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears 2018 us-gaap_DepreciationDepletionAndAmortization Depreciation and amortization Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized us-gaap_CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear 2017 Accounts payable Document Information [Line Items] Document Information [Table] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share us-gaap_PreferredStockConversionBasis Preferred Stock, Conversion Basis us-gaap_AssetsCurrent Total current assets Long-term Debt, Type [Axis] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Entity Filer Category Entity Current Reporting Status Entity Voluntary Filers Long-term Debt, Type [Domain] Entity Well-known Seasoned Issuer us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments Less amount representing interest Employee Stock Purchase Plan [Member] Employee stock purchase plan member. us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments Present value of net minimum lease payments included in accrued expenses and other current liabilities, and long term debt sgrp_CommonStockForConversion Common Stock For Conversion Common stock for conversion. us-gaap_DepreciationAndAmortization Depreciation and amortization Domestic Field Management [Member] Represents information pertaining to domestic field management. Adjustments to reconcile net income to net cash provided by operating activities Entity Central Index Key Entity Registrant Name Entity [Domain] MEXICO Legal Entity [Axis] us-gaap_PreferredStockDividendRatePercentage Preferred Stock, Dividend Rate, Percentage The 2008 Plan [Member] The issuance of shares of common stock to SGRP, represented as the 2008 Stock Compensation Plan ("2008 Plan"). BBVA Bancomer Bank [Member] The legal entity BBVA Bancomer Bank. Non-controlling interest Interbank Interest Rate [Member] The variable interest rate TIIE (Interbank Interest Rate). Schedule of Capital Leased Assets [Table Text Block] 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) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Income taxes paid Capital Leases in Financial Statements of Lessee Disclosure [Text Block] Additional paid-in capital Intangible Assets The amount of non-operating assets recognized as of the acquisition date. Liabilities and equity us-gaap_Assets Total assets Assets Equity: us-gaap_PaymentsToAcquireProductiveAssets Purchases of property and equipment and capitalized software Trading Symbol Reclassification Between Comprehensive Loss Attributable to SPAR Group, Inc. and Comprehensive Loss Attributable to Non-controlling Interest [Member] Represents information pertaining to reclassification between comprehensive loss attributable to SPAR Group, Inc. and comprehensive loss attributable to non-controlling interest. Year Ended December 31, 2016 [Member] Represents information that applies to the year ended December 31, 2016. us-gaap_NetIncomeLoss Net loss attributable to SPAR Group, Inc. Net loss attributable to SPAR Group, Inc. Total SPAR Group, Inc. equity Total SPAR Group, Inc. equity Plan Name [Axis] Bad debt expense, net of recoveries Selling, general and administrative expense Plan Name [Domain] us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Commitments and Contingencies – See Note 9 us-gaap_Liabilities Total liabilities Restricted Stock [Member] Intangible assets, net us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Accounts receivable, net Services provided by affiliates Related Party Transaction, Expenses from Transactions with Related Party us-gaap_RelatedPartyTransactionRate Related Party Transaction, Rate Net book value Antidilutive Securities, Name [Domain] Accumulated amortization Employee Stock Option [Member] Operating activities Schedule of Related Party Transactions [Table Text Block] Antidilutive Securities [Axis] us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Statement [Line Items] Related Party Transactions Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] TURKEY Supplemental disclosure of cash flows information AOCI Attributable to Parent [Member] UNITED STATES Goodwill us-gaap_DebtInstrumentPeriodicPayment Debt Instrument, Periodic Payment Current assets: Property and equipment, net Original cost Foreign currency translation adjustments SOUTH AFRICA us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate 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. us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage sgrp_RelatedPartyOwnershipPercentage Related Party Ownership Percentage Percentage of ownership by a related person in a related entity. us-gaap_DebtInstrumentInterestRateEffectivePercentage Debt Instrument, Interest Rate, Effective Percentage sgrp_NumberOfVehiclesLeased Number Of Vehicles Leased Represents number of vehicles leased under lease arrangement. us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease Net change in cash and cash equivalents us-gaap_TableTextBlock Notes Tables Effect of foreign exchange rate changes on cash Other comprehensive income us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations Net cash used in financing activities us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations Net cash used in investing activities us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest Total equity Balance Balance us-gaap_IncomeLossIncludingPortionAttributableToNoncontrollingInterest Income before income tax expense Income before income tax expense Earnings Per Share [Text Block] Business Acquisition, Acquiree [Domain] us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations Net cash provided by operating activities Business Acquisition [Axis]