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Note 8 - Loan Payable (Details Textual) $ in Thousands				12 Months Ended
	Aug. 08, 2022 USD ($)	Oct. 26, 2021 USD ($)	Jun. 14, 2019 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2023	Oct. 27, 2021 USD ($)
Payments of Financing Costs, Total				$ 748	$ 296	$ 32
Cash and Cash Equivalents, at Carrying Value, Total				23,496	$ 9,105
Lease Commitments [Member]
Other Commitment, Total				900
Operating Expense Commitments [Member]
Other Commitment, Total				17,600
Capital Expenditure Commitments [Member]
Other Commitment, Total				$ 0
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 240,000	$ 180,000
Legal Fees							$ 200
Debt Instrument, Term (Year)			4 years
Maximum Total Funded Debt to EBITDA Ratio	4.00							3.75
Minimum Fixed Charge Coverage Ratio	3.00
Debt Instrument, SOFR Floor	0.00%
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Forecast [Member]
Maximum Total Funded Debt to EBITDA Ratio								3.75
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.10%
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Adjusted One Month SOFR [Member]
Debt Instrument, Basis Spread on Variable Rate	0.10%
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Adjusted Three Month SOFR [Member]
Debt Instrument, Basis Spread on Variable Rate	0.15%
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Adjusted Six Month SOFR [Member]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | General and Administrative Expense [Member]
Payments of Financing Costs, Total							100
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Guaranteed Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 240,000	180,000	$ 240,000						$ 240,000
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member] | Accordion Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 60,000
Fees to Lenders		$ 300					300
Debt Issuance Costs, Gross							$ 400

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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