Note 17 - Restatement of Previously Issued Condensed Consolidated Financial Statements - Financial Statement Restatements (Details) (Parentheticals) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2025	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000	150,000	150,000	150,000	150,000	150,000	150,000
Common stock, shares issued (in shares)	48,709	47,905	47,892	47,877	47,892	47,905	48,709	47,823
Common stock, shares outstanding (in shares)	48,709	47,905	47,892	47,877	47,892	47,905	48,709	47,823
Change in unrealized gain (loss) on available-for-sale securities, tax		$ 17	$ 0	$ 0	$ 0	$ 17	$ 285	$ (153)	$ 1,352
Dividends and dividend equivalents declared per share (in dollars per share)	$ 1.56	$ 1.56	$ 1.56	$ 1.56			$ 6.24	$ 5	$ 4