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Note 7 - Loan Payable (Details Textual) $ in Thousands			3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 08, 2022 USD ($)	Jun. 14, 2019 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2023	Oct. 26, 2021 USD ($)
Payments of Financing Costs, Total			$ 403	$ (0)	$ 668	$ (0)
Royal Bank, Bank of Montreal, Bank of Nova Scotia, HSBC and CIBC [Member]
Debt Issuance Costs, Gross							$ 400
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] | 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	$ 240,000							$ 180,000
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
Legal Fees							$ 200

X

- Definition

The SOFR floor of the debt instrument.

+ References

No definition available.

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- Definition

Amount of fees to lenders incurred during the period.

+ References

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- Definition

Ratio of total funded debt to EDITDA that triggers obligation to repay 50% of excess cash flow as defined under the credit agreement.

+ References

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- Definition

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+ References

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

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- Definition

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.

+ References

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

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- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Publisher FASB
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-Topic 210
-SubTopic 10
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- Definition

The cash outflow for loan and debt issuance costs.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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