The monthly interest rate of the debt outstanding.

No definition available.

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

- Definition

Represents the maximum capital expenditures from covenant terms under the credit facility.

+ References

No definition available.

+ Details

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

- Definition

Represents the maximum indebtedness to tangible net work ratio from covenant terms under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgrp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum consolidated tangible net worth under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the minimum fixed charge coverage ratio from covenant terms under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgrp_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum tangible net worth under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgrp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the percentage of increase in combined and consolidated net profit from covenant terms under the credit facility.

+ References

No definition available.

+ Details

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

- Definition

Percent of eligible domestic accounts receivable less certain reserves to calculate borrowing availability.

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
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-Name Accounting Standards Codification
-Topic 944
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-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a)(2))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ 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(19)(a))
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sgrp_MizuhoBankMember
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Balance Type:
Period Type:

- Details

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- Details

Name:	us-gaap_LineOfCreditFacilityAxis=sgrp_BradesoBankMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=sgrp_SterlingCreditFacilityMember
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- Details

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- Details

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- Details

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- Details

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Note 5 - Credit Facilities (Details Textual) MXN in Millions, AUD in Millions							3 Months Ended
	Dec. 26, 2016 USD ($)	Dec. 26, 2016 BRL	Dec. 22, 2016 USD ($)	Nov. 29, 2016 USD ($)	Mar. 07, 2011 USD ($)	Mar. 07, 2011 JPY (¥)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 JPY (¥)	Mar. 31, 2017 MXN	Mar. 31, 2017 AUD	Mar. 31, 2017 BRL	Mar. 03, 2017 USD ($)	Dec. 26, 2016 BRL	Nov. 29, 2016 BRL	Mar. 07, 2011 JPY (¥)
Mizuho Bank [Member]
Debt Instrument, Face Amount					$ 179,000										¥ 20,000,000
Debt Instrument, Periodic Payment					$ 2,000	¥ 238,000
Debt Instrument, Interest Rate, Stated Percentage					0.10%										0.10%
Loans Payable							$ 24,000	¥ 2,600,000
Line of Credit Facility, Interest Rate at Period End							0.10%	0.10%	0.10%	0.10%	0.10%
Itau Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 477,000										BRL 1,500,000
Long-term Line of Credit							$ 0
Debt Instrument, Interest Rate, Monthly				2.08%
Bradeso Bank [Member]
Debt Instrument, Face Amount	$ 636,000												BRL 2,000,000
Debt Instrument, Periodic Payment	$ 58,000	BRL 184,000
Debt Instrument, Interest Rate, Stated Percentage	17.30%												17.30%
Short-term Debt							$ 459,000				BRL 1,445,000
Line of Credit Facility, Interest Rate at Period End							17.30%	17.30%	17.30%	17.30%	17.30%
Sterling Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 9,000,000				$ 9,000,000					$ 9,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage							0.125%
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability							85.00%	85.00%	85.00%	85.00%	85.00%
Line of Credit Facility, Covenant Terms, Minimum Tangible Net Worth							$ 7,400,000
Line of Credit Facility, Covenant Terms, Minimum Consolidated Tangible Net Worth							$ 10,000,000
Line of Credit Facility, Covenant Terms, Percent of Increase in Net Profit							50.00%
Line of Credit Facility, Covenant Terms, Maximum Indebtedness to Tangible Net Worth Ratio							3	3	3	3	3
Line of Credit Facility, Covenant Terms, Minimum Fixed Charge Coverage Ratio							1.5	1.5	1.5	1.5	1.5
Line of Credit Facility, Covenant Terms, Maximum Capital Expenditures							$ 2,000,000
Sterling Credit Facility [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate			0.50%				0.50%
Oxford Funding Pty Ltd [Member]
Line of Credit Facility, Maximum Borrowing Capacity							$ 917,000			AUD 1.2
Percent Of Eligible Domestic Accounts Receivable Less Certain Reserves To Calculate Borrowing Availability							80.00%	80.00%	80.00%	80.00%	80.00%
Long-term Line of Credit							$ 252,000
Revolving Credit Facility [Member] \| BBVA Bancomer Bank [Member]
Line of Credit Facility, Maximum Borrowing Capacity							267,000		MXN 5
Long-term Line of Credit							$ 0
Line of Credit Facility, Interest Rate at Period End							10.50%	10.50%	10.50%	10.50%	10.50%
Revolving Credit Facility [Member] \| Interbank Interest Rate [Member] \| BBVA Bancomer Bank [Member]
Debt Instrument, Basis Spread on Variable Rate							4.00%