Note 5 - Accrued Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 15, 2023	Dec. 31, 2022
Accrued dividends and dividend equivalents payable	$ 735		$ 733	$ 5,600	$ 5,500
Accrued compensation and related benefits	19,000	$ 14,600
Accrued liabilities	48,378	52,225
Estimated aggregate liability	5,300	5,200
Restricted cash	800	800
Other long-term liabilities
Estimated aggregate liability	3,200	$ 3,100
Accounts Payable and Accrued Liabilities
Accrued dividends and dividend equivalents payable	5,500
Accrued liabilities	$ 3,800