Note 9 - Intellectual Property - Intellectual Property (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Gross	$ 69,238	$ 69,238
Finite-Lived Intangible Assets, Accumulated Amortization	(67,181)	(66,801)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(820)	(861)
Intellectual property, net	1,237	1,576
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	68,838	68,838
Finite-Lived Intangible Assets, Accumulated Amortization	(66,902)	(66,562)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(837)	(874)
Intellectual property, net	1,099	1,402
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	400	400
Finite-Lived Intangible Assets, Accumulated Amortization	(279)	(239)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	17	13
Intellectual property, net	$ 138	$ 174