Note 6 - Preferred Stock (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2010	Dec. 31, 2014
Note 6 - Preferred Stock (Details) [Line Items]
Preferred Stock, Shares Authorized	2,445,598us-gaap_PreferredStockSharesAuthorized	3,000,000us-gaap_PreferredStockSharesAuthorized	2,445,598us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	0.01	0.01	$ 0.01
Common Stock for Conversion		554,402sgrp_CommonStockforConversion
Preferred Stock, Shares Outstanding	0us-gaap_PreferredStockSharesOutstanding		0us-gaap_PreferredStockSharesOutstanding
Preferred Stock, Shares Issued	0us-gaap_PreferredStockSharesIssued		0us-gaap_PreferredStockSharesIssued
Series A Preferred Stock [Member]
Note 6 - Preferred Stock (Details) [Line Items]
Preferred Stock, Shares Authorized	2,445,598	3,000,000
Preferred Stock, Dividend Rate, Percentage	10.00%
Preferred Stock, Conversion Basis		one-to-one
Preferred Stock, Shares Outstanding	0
Preferred Stock, Shares Issued	0

The number of shares of SGRP's Common Stock, not including dividends, issued upon conversion of Preferred Stock.

No definition available.

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Namespace Prefix:	sgrp_
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- Details

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- Definition

Describe the conversion features of preferred stock if preferred stock is convertible. That is, shares of preferred stock into which another convertible security was converted, or shares of preferred stock into which another class of preferred stock was converted.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

+ Details

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

+ Details

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- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

+ Details

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- Details

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