Note 5 - Accrued Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accrued liabilities	$ 46,485	$ 41,806
Estimated aggregate liability	4,900	3,600
Restricted cash	900	900
Other long-term liabilities
Estimated aggregate liability	$ 3,200	$ 2,700