Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accrued risk reserves	$ 2,012	$ 1,898
Accrued expenses	7,695	7,346
Tax basis in excess of book basis of fixed assets	0	5,653
Stock based compensation	1,181	931
Deferred revenue	3,154	4,987
Operating lease liabilities	19,896	23,658
Other	847	567
Total gross deferred tax assets	34,785	45,050
Less: valuation allowance	(517)	(594)
Deferred tax assets less valuation allowance	34,268	44,446
Unrealized gains on marketable securities	(28,581)	(19,971)
Deferred gain on sale of assets, net	(2,055)	(2,055)
Book basis in excess of tax basis of intangible assets	(5,655)	(3,387)
Book basis in excess of tax basis of securities	(4,042)	(3,393)
Book basis in excess of tax basis of fixed assets	(6,579)	0
Long–term investments	(2,652)	(8,753)
Operating lease assets	(20,254)	(24,087)
Total deferred tax liabilities	(69,818)	(61,646)
Net deferred tax liability	$ (35,550)	$ (17,200)