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Note 8 - Syndicated Revolver (Details Textual) $ in Millions		9 Months Ended	12 Months Ended
	Sep. 22, 2023 USD ($)	Sep. 21, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2024	Mar. 31, 2024	Jun. 14, 2019 USD ($)
Debt Instrument, Required Principal Payment	$ 211.9
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Guaranteed Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 240.0
Repayments of Debt		$ 16.3	$ 17.8
Debt Instrument, Face Amount			50.9
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Guaranteed Credit Facility [Member] | Interest Expense, Net [Member]
Amortization of Debt Issuance Costs			0.1
Bank of Montreal [Member] | The 2023 Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 240.0
Repayments of Debt			10.0
Line of Credit Facility, Increasing Capacity, Total Funded Debt to Adjusted EBITDA Ratio Benchmark	3.75
Debt Instrument, Fee Amount	$ 0.9
Legal Fees	$ 0.3
Debt Instrument, Face Amount			$ 50.9
Maximum Total Funded Debt to EBITDA Ratio	4.5		4.25
Minimum Fixed Charge Coverage Ratio	3
Bank of Montreal [Member] | The 2023 Credit Facility [Member] | Forecast [Member]
Maximum Total Funded Debt to EBITDA Ratio				3.75	4
Bank of Montreal [Member] | The 2023 Credit Facility [Member] | Maximum [Member]
Line of Credit Facility, Additional Borrowing Capacity Available Through New Commitment	$ 60.0

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