Note 7 - Intellectual Property - Intellectual Property (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Gross	$ 69,238	$ 69,238
Finite-Lived Intangible Assets, Accumulated Amortization	(64,314)	(59,111)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(802)	(235)
Intellectual property, net	4,122	9,892
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	68,838	68,838
Finite-Lived Intangible Assets, Accumulated Amortization	(64,094)	(58,912)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(812)	(262)
Intellectual property, net	3,932	9,664
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	400	400
Finite-Lived Intangible Assets, Accumulated Amortization	(220)	(199)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	10	27
Intellectual property, net	$ 190	$ 228