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

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments applied to principal.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Fixed interest rate related to the interest rate derivative.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Nominal or face amount used to calculate payment on derivative.

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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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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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Note 15 - Indebtedness (Details Textual) - USD ($)			3 Months Ended		6 Months Ended
Note 15 - Indebtedness (Details Textual) - USD ($)	Dec. 22, 2021	Feb. 01, 2018	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Long-Term Debt, Total			$ 100,000,000		$ 100,000,000
Interest Rate Swap [Member]
Derivative, Notional Amount		$ 20,000,000	7,100,000		7,100,000
Derivative, Term of Contract (Year)		5 years
Derivative, Fixed Interest Rate		2.70%
Interest Rate Swap [Member] \| Other Nonoperating Income (Expense) [Member]
Derivative, Gain (Loss) on Derivative, Net, Total			67,000	$ 64,000	182,000	$ 144,000
Interest Rate Swap [Member] \| Other Assets [Member]
Derivative, Fair Value, Net, Total			6,000		6,000
Interest Rate Swap [Member] \| Other Current Liabilities [Member]
Derivative, Fair Value, Net, Total			(176,000)		(176,000)
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member]
Debt Instrument, Face Amount	$ 130,000,000
Long-Term Debt, Total			100,000,000		100,000,000
Letters of Credit Outstanding, Amount			$ 700,000		$ 700,000
Debt Instrument, Interest Rate, Stated Percentage			3.40%		3.40%
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member] \| Bloomberg Short-term Bank Yield Index Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member] \| Bloomberg Short-term Bank Yield Index Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member] \| Prime Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member] \| Secured Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 90,000,000
Subsidiary Guarantors [Member] \| Second Amended and Restated Credit Agreement [Member] \| Secured Term Loan [Member]
Debt Instrument, Face Amount	40,000,000
Debt Instrument, Periodic Payment, Principal	$ 1,000,000