Note 7 - Intellectual Property - Intellectual Property (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets, Gross	$ 69,238	$ 69,238
Finite-Lived Intangible Assets, Accumulated Amortization	(67,361)	(67,181)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(865)	(820)
Intellectual property, net	1,012	1,237
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	68,838	68,838
Finite-Lived Intangible Assets, Accumulated Amortization	(67,072)	(66,902)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	(868)	(837)
Intellectual property, net	898	1,099
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	400	400
Finite-Lived Intangible Assets, Accumulated Amortization	(289)	(279)
Finite-Lived Intangible Assets, Foreign Currency Translation Impact	3	17
Intellectual property, net	$ 114	$ 138