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Note 3 - Debt (Details Textual) $ in Millions	Apr. 18, 2024 USD ($)	Feb. 01, 2023 USD ($)	Sep. 30, 2025 USD ($)	Feb. 01, 2023 CAD ($)	Jul. 01, 2022 USD ($)
Resource Plus, Inc [Member]
Payments to Acquire Interest in Joint Venture	$ 3,000,000
Long-Term Debt, Gross			$ 1,600,000
Revolving Credit Facility [Member] | North Mill, LLC [Member]
Debt Instrument, Interest Rate, Stated Percentage			9.15%
Long-Term Debt			$ 23,800,000
Loans Payable, Current			23,000,000
Revolving Credit Facility [Member] | North Mill, LLC [Member] | SPAR Marketing Force [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 28,000,000
Debt Instrument, Covenant, Unbilled Cap		$ 7,000,000			$ 6,500,000
Revolving Credit Facility [Member] | North Mill, LLC [Member] | SPAR Canada Company [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 2
Long-Term Debt			$ 800,000
NM Note [Member] | North Mill, LLC [Member]
Debt Instrument, Basis Spread on Variable Rate		1.90%
NM Note [Member] | North Mill, LLC [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		6.75%
NM Notes Commencing on 10 October 2022 [Member] | North Mill, LLC [Member]
Debt Instrument, Facility Fee for Any Advances Other Than Under Revolving Credit Faculty, Percentage		0.80%
Debt Instrument, Fee for Each Incremental 1 Million Increase in Loan Balance in Excess of $21 Million		$ 15,000

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