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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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