Note 12 - Convertible Senior Notes - Schedule of Carrying Value of Convertible Senior Notes (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024	Dec. 05, 2023
Net carrying amount	$ 133,936	$ 134,497
The 5.250% Convertible Senior Notes Due 2026 [Member]
Principal	3,500,000	3,500,000	$ 80,200,000
Unamortized debt issuance costs	0	(83,000)
Net carrying amount	3,500,000	3,417,000
Convertible Notes Maturing 2030 [Member]
Principal	125,000,000	125,000,000
Unamortized debt issuance costs	(3,962,000)	(4,336,000)
Net carrying amount	130,436,000	131,080,000
Premium upon issuance	$ 9,398,000	$ 10,416,000