The amount reported in net expense that is less than the would be charges for period under the counter proposal.

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:	sgrp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of the workforce provided by related parties.

+ References

No definition available.

+ Details

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

- Definition

Total costs related to services rendered by an entity during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- 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

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

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
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://www.xbrl.org/2003/role/presentationRef

-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 2: http://www.xbrl.org/2003/role/presentationRef

-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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-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

+ Details

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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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrAndMsYilmazMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrBrianMasonMrGarryBristowAndMrAdrianWingfieldMember
Namespace Prefix:
Data Type:	na
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- Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_SBSMember
Namespace Prefix:
Data Type:	na
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Note 10 - Related-party Transactions (Details) (USD $)	12 Months Ended		1 Months Ended	0 Months Ended
Note 10 - Related-party Transactions (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Aug. 31, 2013
Note 10 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	8.00%
SBS [Member] \| Domestic Merchandising Specialists Field Force [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	81.00%	77.00%
SBS [Member] \| Domestic Field Management [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Cost of Services (in Dollars)	26,000,000
SBS [Member] \| Counter Proposed Cost Plus Fee [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.97%
SBS [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Amount Reported in Net Expense that is Less than the Counter Proposal (in Dollars)			30,000
SAS [Member] \| Domestic Field Management [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	92.00%	96.00%
SAS [Member] \| Counter Proposed Cost Plus Fee [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	4.00%
SAS [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Amount Reported in Net Expense that is Less than the Counter Proposal (in Dollars)			6,000
SBS and SAS [Member] \| Domestic Field Management [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Cost of Services (in Dollars)		25,000,000
SBS and SAS [Member] \| Plus 4% Compensation [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	4.00%
Related Party Transaction, Amounts of Transaction (in Dollars)	974,000	944,000
SBS and SAS [Member] \| Administrative Services [Member] \| Without Charge [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction (in Dollars)	637,000	551,000
SBS and SAS [Member] \| Proposed Cost Plus Fee [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.00%
NMS [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent	51.00%		51.00%
NRS [Member] \| Plus 2% Compensation [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.00%
Related Party Transaction, Amounts of Transaction (in Dollars)	44,000	37,000
CMR Meridien [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent	51.00%		51.00%
Mr. Brian Mason, Mr. Garry Bristow, and Mr. Adrian Wingfield [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%		49.00%
NDS [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent	51.00%		51.00%
Mr. and Ms. Yilmaz [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%		49.00%
Affinity [Member] \| Maximum [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	1.00%		1.00%
Spar Business Ideas Provider S.R.L. [Member] \| Gross Sales Price [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction (in Dollars)				348,465
Spar Business Ideas Provider S.R.L. [Member] \| Cash Paid At Closing [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction (in Dollars)				$ 187,767
Spar Business Ideas Provider S.R.L. [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	6.00%
NMA [Member]
Note 10 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%		49.00%