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Note 12 - Subsequent Events (Details Textual) - USD ($) | Oct. 08, 2024 | Jun. 05, 2024
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South African Joint Venture [Member] | SPAR Group [Member] | Subsequent Event [Member] |  |
Percent Of Ownership Interest In Subsidiary Sold By Company | 51.00% |
Highwire Capital Acquiring SGRP [Member] |  |
Business Acquisition, Share Price (in dollars per share) |  | $ 2.5
Business Combination, Price of Acquisition, Expected |  | $ 58,000,000

X
- Definition Percent of ownership interest in subsidiary sold by company. + References No definition available. + Details
Name: | sgrp_PercentOfOwnershipInterestInSubsidiarySoldByCompany
Namespace Prefix: | sgrp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase price of expected business acquisition prior to consideration being transferred. Excludes asset acquisition. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 15 -Paragraph 3 -SubTopic 10 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479455/805-10-15-3 + Details
Name: | us-gaap_BusinessCombinationPriceOfAcquisitionExpected
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=sgrp_SouthAfricanJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=sgrp_SparGroupMember
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: | us-gaap_BusinessAcquisitionAxis=sgrp_HighwireCapitalAcquiringSgrpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |