Note 16 - Interest Bearing Loans (Details Textual) - New Credit Facility [Member] $ in Thousands	Oct. 01, 2021 USD ($)	Jul. 28, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200,000
Line of Credit Facility, Option to Increase Maximum Borrowing Capacity	$ 250,000
Debt Instrument, Covenant, Minimum EBITDA of Guarantors	80.00%
Debt Instrument, Covenant, Minimum Consolidated Assets of Guarantors	70.00%
Debt Instrument, Covenant, Minimum EBITDA and Assets of Subsidiaries	5.00%
Debt Instrument, LIBOR Floor	0.00%
Line of Credit Facility, Commitment Fee Percentage	30.00%
Debt Instrument, Covenant, Minimum Cash Flow Cover Ratio	1.5
Debt Instrument, Covenant, Minimum Interest Cover Ratio	4.0
Debt Instrument, Covenant, Maximum Senior Leverage Ratio	2.25			2.25
Debt Instrument, Maximum Percentage of Aggregate Capital Expenditures	110.00%
Repurchase or Redemption of Shares, Maximum Aggregate Amount				$ 50,000
Drawdowns as Loans [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 130,000
Long-Term Debt, Total			$ 0		$ 0
Drawdowns as Loans [Member] | One-third Drawn [Member]
Line of Credit Facility, Upfront Fee Percentage	0.25%
Drawdowns as Loans [Member] | Two-thirds Drawn [Member]
Line of Credit Facility, Upfront Fee Percentage	0.50%
Drawdowns as Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.75%
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 70,000
Line of Credit Facility, Upfront Fee Percentage	0.75%
Letter of Credit [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity, Increased Amount		$ 18,000
Letter of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.00%
Bonds and Guarantees [Member]
Long-Term Debt, Total			$ 31,800		$ 33,400