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Note 6 - Syndicated Revolver (Details Textual) $ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 22, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024	Jun. 14, 2019 USD ($)
Bank of Montreal [Member] | The 2023 Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 240.0
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	3.75	3.75	4.25	4
Minimum Fixed Charge Coverage Ratio	3
Debt Instrument, Required Principal Payment	$ 199.9
Bank of Montreal [Member] | The 2023 Credit Facility [Member] | Maximum [Member]
Line of Credit Facility, Additional Borrowing Capacity Available Through New Commitment	$ 60.0
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
Debt Instrument, Face Amount				$ 50.9
Repayments of Debt		$ 6.5	$ 12.0
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

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