Note 15 - Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Total debt	$ 299,284	$ 339,918	$ 340,347
Debt issuance costs and other	8,346	8,814	8,954
Long-Term Debt, Current Maturities, Total	8,735	8,727	8,700
Long-Term Debt, Excluding Current Maturities, Total	290,549	331,191	331,647
Convertible Debt [Member] | The 2.75% Convertible Notes [Member]
Total debt	230,000	207,354	202,018
Term Loan [Member] | The Credit Agreement [Member]
Total debt	60,938	123,750	129,375
Long-Term Debt, Current Maturities, Total	7,500	7,500	7,500
Long-Term Debt, Excluding Current Maturities, Total	$ 53,400	$ 116,300	$ 121,900