The additional amount of funding the Company provided for field specialist payments.

No definition available.

Name:	sgrp_AdditionalFundingForFieldSpecialistPayments
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The estimated additional amount of field specialist payments.

+ References

No definition available.

+ Details

Name:	sgrp_EstimatedAdditionalFieldSpecialistPayments
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of estimated reimbursement related to advances made.

+ References

No definition available.

+ Details

Name:	sgrp_EstimatedReimbursementOnAdvances
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of insurance premium refund receivable.

+ References

No definition available.

+ Details

Name:	sgrp_InsurancePremiumRefundReceivable
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The parent entity's majority interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	sgrp_MajorityInterestOwnershipPercentageByParent
Namespace Prefix:	sgrp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of available field merchandising specialists.

+ References

No definition available.

+ Details

Name:	sgrp_NumberOfMerchandisingSpecialists
Namespace Prefix:	sgrp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of full-time national, regional, and district administrators.

+ References

No definition available.

+ Details

Name:	sgrp_NumberOfNationalRegionalAndDistrictAdministrators
Namespace Prefix:	sgrp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of vehicles leased under lease arrangement.

+ References

No definition available.

+ Details

Name:	sgrp_NumberOfVehiclesLeased
Namespace Prefix:	sgrp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of vehicles subleased.

+ References

No definition available.

+ Details

Name:	sgrp_NumberOfVehiclesSubleased
Namespace Prefix:	sgrp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of payments for required cash collateral deposits.

+ References

No definition available.

+ Details

Name:	sgrp_PaymentsForCashCollateralDeposits
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of payment for required cash collateral deposits allocated to a related party.

+ References

No definition available.

+ Details

Name:	sgrp_PaymentsForCashCollateralDepositsAllocatedToRelatedParty
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid for domestic related party services.

+ References

No definition available.

+ Details

Name:	sgrp_PaymentsForRelatedPartyServices
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the percentage of reimbursement based on total cost.

+ References

No definition available.

+ Details

Name:	sgrp_PercentOfReimbursement
Namespace Prefix:	sgrp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of service provided by related party.

+ References

No definition available.

+ Details

Name:	sgrp_PercentOfServiceProvidedByRelatedParty
Namespace Prefix:	sgrp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of ownership by a related person in a related entity.

+ References

No definition available.

+ Details

Name:	sgrp_RelatedPartyOwnershipPercentage
Namespace Prefix:	sgrp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of legal expenses reimbursed by the company to the related party.

+ References

No definition available.

+ Details

Name:	sgrp_RelatedPartyTransactionReimbursementOfLegalExpensesFromTransactionWithRelatedParty
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount recorded during the period as a reserve for receivables from related parties.

+ References

No definition available.

+ Details

Name:	sgrp_ReserveForRelatedPartyReceivablesAmountRecordedDuringPeriod
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount are withheld by the company of final mark-up compensation due to a related party.

+ References

No definition available.

+ Details

Name:	sgrp_WithheldFinalMarkUpCompensationDueRelatedParty
Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12021-110248

+ Details

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of transactions with related party during the financial reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

+ Details

Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

+ Details

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=108788376&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_LitigationCaseAxis=sgrp_AffinityReturnsFromSasAndSbsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=sgrp_AffinityCashCollateralLoanToSBSInTheSBSChapter11ProceedingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sgrp_SGRPHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_NMSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_MerholdPropertyTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_SGRPHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=sgrp_SPARBSMTJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_JKCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_EILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_EILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_NMSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_NSRSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_ResourcePlusIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_RJHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_MeridianMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=sgrp_SPARTodopromoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SBSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=sgrp_PostTerminationExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_DomesticMerchandisingSpecialistsFieldForceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_DomesticFieldManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_CostPlusFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_AdvancesForAffinityInsurancePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SparInfotechIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=sgrp_AllegedLostTaxBenefitsAndOtherExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=sgrp_AllegedlyOwedProgrammingServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_NMSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_ResourcePlusIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MeridianMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrMasonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_MerholdHoldingTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrMasonAndMrBristowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_MerholdCapePropertyTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrBristowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrWingfieldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SPARTodopromoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrJuanFMedinaDomenzainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sgrp_CONMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SPARMarketingForceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_AllOthersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SASSBSAndSMFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=sgrp_AffinityInsuranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_RobertGBrownAndWilliamHBartelsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SBSAndSASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 10 - Related Party Transactions (Details Textual)					1 Months Ended	5 Months Ended	7 Months Ended		11 Months Ended	12 Months Ended		67 Months Ended
Note 10 - Related Party Transactions (Details Textual)	Sep. 18, 2018 USD ($)	Sep. 08, 2016	Jun. 01, 2016	Dec. 01, 2014 USD ($)	Nov. 30, 2017 USD ($)	May 31, 2016	Jul. 31, 2018 USD ($)	Jul. 27, 2018 USD ($)	Nov. 23, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Aug. 01, 2018 USD ($)
Related Party Transaction, Expenses from Transactions with Related Party										$ 21,323,000	$ 31,762,000
Insurance Premium Refund Receivable										150,000
Affinity Returns from SAS and SBS [Member]
Estimated Litigation Liability										900,000
Affinity Cash Collateral loan to SBS in the SBS Chapter 11 Proceeding [Member]
Loss Contingency, Damages Sought, Value										$ 375,000
SGRP Holdings [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
NMS [Member]
Percent of Reimbursement										1.00%
Merhold Property Trust [Member]
Number Of Vehicles Subleased										20
Number Of Vehicles Leased										172
Lessee, Operating Lease, Term of Contract										4 years
SGRP Holdings [Member] \| SPAR BSMT Joint Venture [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		51.00%
JKC [Member] \| SPAR BSMT Joint Venture [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		39.00%
EILLC [Member] \| SPAR BSMT Joint Venture [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		10.00%
EILLC [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										10.00%
NMS [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										49.00%
NSRS [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										100.00%
Resource Plus, Inc [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										49.00%
RJ Holdings [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										50.00%
Meridian [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										49.00%
SPAR Todopromo [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners										49.00%
SBS [Member]
Number of Merchandising Specialists								3,800			3,800
Withheld Final Mark-up Compensation Due to Related Party				$ 125,000
Additional Funding for Field Specialist Payments				12,000
Estimated Additional Field Specialist Payments				$ 120,000
Related Party Transaction, Reimbursement of Legal Expenses from Transaction with Related Party							$ 50,000		$ 50,000		$ 260,000
Payments for Cash Collateral Deposits, Allocated to Related Party												$ 379,000
SBS [Member] \| Post-termination Expenses [Member]
Loss Contingency, Estimate of Possible Loss										$ 120,000
SBS [Member] \| Domestic Merchandising Specialists Field Force [Member]
Payments for Related Party Services								$ 15,400,000			$ 25,900,000
Percent Of Service Provided By Related Party								27.00%			77.00%
SBS [Member] \| Domestic Field Management [Member]
Related Party Transaction, Expenses from Transactions with Related Party								$ 18,100,000			$ 30,100,000
SBS [Member] \| Cost Plus Fees [Member]
Related Party Transaction, Rate			2.00%	2.96%		4.00%
SAS [Member]
Number of National, Regional, and District Administrators							52				52
Payments for Cash Collateral Deposits												965,000
SAS [Member] \| Post-termination Expenses [Member]
Loss Contingency, Estimate of Possible Loss										76,000
SAS [Member] \| Domestic Field Management [Member]
Payments for Related Party Services							$ 2,700,000				$ 4,200,000
Percent Of Service Provided By Related Party							53.00%				91.00%
Related Party Transaction, Expenses from Transactions with Related Party								$ 2,700,000			$ 4,200,000
SAS [Member] \| Advances for Affinity Insurance Plan [Member]
Related Party Transaction, Amounts of Transaction										$ 225,000
SPAR InfoTech, Inc. [Member] \| Alleged Lost Tax Benefits and Other Expenses [Member]
Loss Contingency, Damages Sought, Value	$ 190,000
SPAR InfoTech, Inc. [Member] \| Allegedly Owed Programming Services [Member]
Loss Contingency, Damages Sought, Value	$ 900,000
NMS [Member]
Majority Interest Ownership Percentage By Parent										51.00%
Resource Plus, Inc [Member]
Majority Interest Ownership Percentage By Parent										51.00%
Meridian [Member]
Majority Interest Ownership Percentage By Parent										51.00%
Mr. Mason [Member] \| Merhold Property Trust [Member]
Related Party Ownership Percentage										50.00%
Mr. Mason [Member] \| Merhold Holding Trust [Member]
Related Party Ownership Percentage										46.70%
Mr. Mason and Mr. Bristow [Member] \| Merhold Cape Property Trust [Member]
Related Party Ownership Percentage										50.00%
Mr. Bristow [Member] \| Merhold Holding Trust [Member]
Related Party Ownership Percentage										20.00%
Mr. Wingfield [Member] \| Merhold Holding Trust [Member]
Related Party Ownership Percentage										33.30%
SPAR Todopromo [Member]
Majority Interest Ownership Percentage By Parent										51.00%
Mr. Juan F. Medina Domenzain [Member] \| CON [Member]
Related Party Ownership Percentage										90.00%
SPAR Marketing Force [Member]
Payments for Cash Collateral Deposits, Allocated to Related Party												296,000
All Others [Member]
Payments for Cash Collateral Deposits, Allocated to Related Party												290,000
SAS, SBS, and SMF [Member] \| Affinity Insurance [Member]
Estimated Reimbursement on Advances												$ 675,000
Robert G. Brown and William H. Bartels [Member]
Related Party Ownership Percentage					59.00%
SBS And SAS [Member]
Reserve for Related-party Receivables, Amount Recorded During Period					$ 675,000