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Note 8 - Related Party Transactions (Details Textual) $ / shares in Units, R$ in Millions								1 Months Ended	5 Months Ended	9 Months Ended
	Sep. 25, 2024 USD ($)	Apr. 30, 2024 shares	Apr. 29, 2024 USD ($) $ / shares	Apr. 29, 2024 ZAR (R)	Apr. 18, 2024 USD ($)	Feb. 23, 2024 USD ($)	Feb. 07, 2024 ZAR (R)	Aug. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) shares	Sep. 30, 2024 USD ($) shares	Mar. 30, 2024	Mar. 26, 2024 USD ($)	Mar. 26, 2024 BRL (R$)
SGRP Meridian [Member]
Disposal Group, Including Discontinued Operation, Consideration | R							R 180,700,000
Proceeds from Sales of Business, Affiliate and Productive Assets			$ 7,700,000	R 144,560,000
Brazil Joint Venture [Member]
Disposal Group, Including Discontinued Operation, Consideration												$ 11,800,000	R$ 58.9
SPAR Japan [Member]
Disposal Group, Including Discontinued Operation, Consideration								$ 500,000
Indian Joint Venture [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 500,000
SPAR BSMT [Member]
Subsidiary, Ownership Percentage, Parent											51.00%
Meridian [Member] | FRIEDSHELF 401 Proprietary Limited [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner											49.00%
SPAR Group [Member] | SGRP Meridian [Member]
Percent Of Ownership Interest In Subsidiary Sold By Company							51.00%
SPAR Group [Member] | SPAR China [Member]
Percent Of Ownership Interest In Subsidiary Sold By Company						51.00%
Proceeds From Sale of Ownership Interest						$ 200,000
SPAR Group [Member] | SPAR Japan [Member]
Percent Of Ownership Interest In Subsidiary Sold By Company								100.00%
SPAR Group [Member] | Indian Joint Venture [Member]
Percent Of Ownership Interest In Subsidiary Sold By Company	51.00%
SPAR Marketing Force [Member]
Subsidiary, Ownership Percentage, Parent												51.00%	51.00%
Resource Plus, Inc [Member]
Payments to Acquire Interest in Joint Venture					$ 3,000,000
Resource Plus Acquisition Note [Member]
Payments to Acquire Interest in Joint Venture					250,000				$ 250,000
Debt Instrument, Face Amount					$ 2,750,000
Long-Term Debt, Gross									$ 2,750,000	$ 2,750,000
CIC Agreement [Member]
Preferred Stock, Shares Issued (in shares) | shares									2,000,000	2,000,000
Preferred Stock, Shares Issuable (in shares) | shares									3,000,000	3,000,000
William Bartels [Member]
Liability, Pension and Other Postretirement and Postemployment Benefits, Current									$ 58,000	$ 58,000
William Bartels [Member] | The 2024 Stock Repurchase Program [Member]
Treasury Stock, Shares, Acquired (in shares) | shares		1,000,000
Share Price (in dollars per share) | $ / shares			$ 1.8
William Bartels [Member] | Premium Adjustments [Member]
Related Party Transaction, Amounts of Transaction										200,000
William Bartels [Member] | Remaining Premium Adjustments [Member]
Related Party Transaction, Amounts of Transaction										1,100,000
WB Marketing, Inc [Member] | Service Fees [Member]
Related Party Transaction, Amounts of Transaction										$ 101,000

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