Note 5 - Debt (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Apr. 29, 2022	Apr. 23, 2022	Feb. 19, 2021	Apr. 17, 2020
Credit Facility [Member]
Debt Agreement, Maximum Borrowing Capacity					$ 350,000
Long-Term Debt, Total	$ 51,000
Debt Issuance Costs, Net, Total	3,166
Credit Facility [Member] | Subsequent Event [Member]
Debt Agreement, Maximum Borrowing Capacity			$ 350,000
Long-Term Debt, Total				$ 78,000
Credit Facility [Member] | Other Assets [Member]
Debt Issuance Costs, Net, Total	1,995
Credit Facility [Member] | Other Assets [Member] | Subsequent Event [Member]
Debt Issuance Costs, Net, Total			285
Credit Facility [Member] | Other Current Assets [Member]
Debt Issuance Costs, Net, Total	694
Credit Facility [Member] | Other Current Assets [Member] | Subsequent Event [Member]
Debt Issuance Costs, Net, Total			99
Credit Facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 35,000
Debt Issuance Costs, Net, Total		$ 3,263
Credit Facility [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity			50,000
Credit Facility [Member] | Draw Term Loan [Member]
Long-Term Debt, Total						$ 130,000
Credit Facility [Member] | Draw Term Loan [Member] | Subsequent Event [Member]
Long-Term Debt, Total			$ 300,000
Draw Term Loan [Member]
Debt Issuance Costs, Net, Total		2,797
Amortization of Debt Issuance Costs	$ 485	$ 485