Note 11 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Federal net operating loss	$ 70,779	$ 68,022
State net operating loss	59,650	55,134
Foreign net operating loss	13,315	16,947
Research and development expense	21,431	14,349
Tax credits	20,827	22,488
Stock options	30,431	33,558
Accruals	4,743	2,724
Equity investments	25,718	17,309
Bad debts	348	265
Lease liability	1,578	1,842
Foreign credits	9,653	9,629
Available-for-sale securities	2,642	2,649
Operating lease asset	17,141	10,919
Fixed assets	318	0
Investment in subsidiaries	0	3,659
Other	3,558	5,263
Deferred income tax assets	282,132	264,757
Intangible assets	(91,020)	(94,856)
Operating lease liability	(16,773)	(10,675)
Fixed assets	0	(180)
Other	(3,067)	(3,097)
Deferred income tax liabilities	(110,860)	(108,808)
Net deferred income tax assets	171,272	155,949
Valuation allowance	(294,563)	(279,212)
Net deferred income tax assets (liabilities)	$ (123,291)	$ (123,263)