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

No definition available.

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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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents number of specialist provided by a related party.

+ References

No definition available.

+ Details

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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

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

- Definition

Represents number of vehicles subleased.

+ References

No definition available.

+ Details

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

- Definition

The percentage of ownership that has been transferred to related parties.

+ References

No definition available.

+ Details

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

- Definition

The percentage of the workforce provided by related parties.

+ References

No definition available.

+ Details

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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

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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 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

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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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 3

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: 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 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_RelatedPartyTransactionAxis=sgrp_AdministrativeServicesMember
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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_DomesticFieldManagementMember
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_Plus2CompensationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=sgrp_Plus4PercentCompensationMember
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

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Data Type:	na
Balance Type:
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- Details

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Data Type:	na
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Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sgrp_MrBrianMasonMrGarryBristowAndMrAdrianWingfieldMember
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Note 5 - Related-party Transactions (Details) (USD $)	3 Months Ended		0 Months Ended	12 Months Ended
Note 5 - Related-party Transactions (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Aug. 01, 2013	Dec. 31, 2014	Jan. 02, 2015
Proposed Cost Plus Fee [Member] \| SBS and SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.00%
Counter Proposed Cost Plus Fee [Member] \| SBS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.97%
Counter Proposed Cost Plus Fee [Member] \| SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	4.00%
Domestic Merchandising Specialists Field Force [Member] \| SBS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	86.00%	82.00%
Number of Specialists Provided by Related Party	4,800
Domestic Merchandising Specialists Field Force [Member] \| NRS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	4.00%	4.00%
Number of Specialists Provided by Related Party			294
Domestic Field Management [Member] \| SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Percent of Service Provided by Related Party	91.00%	93.00%
Domestic Field Management [Member] \| SBS and SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Cost of Services (in Dollars)		6,600,000
Administrative Services [Member] \| SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Number of Specialists Provided by Related Party	54
Administrative Services [Member] \| SBS and SAS [Member] \| Without Charge [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Amounts of Transaction (in Dollars)	163,000	106,000
Plus 4% Compensation [Member] \| SBS and SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate				4.00%
Related Party Transaction, Amounts of Transaction (in Dollars)	133,000	255,000
Plus 2% Compensation [Member] \| NRS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party Transaction, Rate	2.00%
Related Party Transaction, Amounts of Transaction (in Dollars)	5,000	10,000
Mr. Brown [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Percentage Ownership Transferred to Related Parties					84.00%
SBS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Amount Reported in Net Expense that is Less than the Counter Proposal (in Dollars)	52,000
SAS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Amount Reported in Net Expense that is Less than the Counter Proposal (in Dollars)	22,000
NMS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent	51.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%
CMR Meridien [Member] \| Lease Arrangement With MCPT [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Number of Vehicles Subleased	2
Number of Vehicles Leased	126
Lessee Leasing Arrangements, Operating Leases, Term of Contract	4 years
CMR Meridien [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent	51.00%
Mr. Brian Mason, Mr. Garry Bristow, and Mr. Adrian Wingfield [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%
Mr. Mason [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Related Party, Ownership Percentage	50.00%
NDS [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Majority Interest, Ownership Percentage by Parent				51.00%
Mr. and Ms. Yilmaz [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				49.00%
Related Party, Ownership Percentage	40.00%
Affinity [Member] \| Maximum [Member]
Note 5 - Related-party Transactions (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent				1.00%