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Note 15 - Subsequent Events (Details Textual) R$ in Millions	Jun. 30, 2024 USD ($)	Jun. 30, 2024 ZAR (R)	Jun. 30, 2024 BRL (R$)	Mar. 26, 2024	Feb. 23, 2024	Feb. 07, 2024
Forecast [Member] | SGRP Meridian [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 9,900,000	R 180,700,000
Disposal Group, Including Discontinued Operation, Consideration Percentage Receiving on Closing	80.00%	80.00%	80.00%
Forecast [Member] | SPAR Marketing Force [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 200,000
Forecast [Member] | Brazil Joint Venture [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 11,800,000		R$ 58.9
Subsequent Event [Member] | SGRP Meridian [Member]
Noncontrolling Interest, Ownership Percentage by Parent						51.00%
Subsequent Event [Member] | SPAR Marketing Force [Member]
Noncontrolling Interest, Ownership Percentage by Parent				51.00%	51.00%

X

- Definition

Percentage of consideration received on closing for disposal group.

+ References

No definition available.

+ Details

Name:	sgrp_DisposalGroupIncludingDiscontinuedOperationConsiderationPercentageReceivingOnClosing
Namespace Prefix:	sgrp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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

X

- 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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=sgrp_SGRPMeridianMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=sgrp_BrazilJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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