Note 7 - Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Gross Carrying Amount	$ 9,470
Accumulated amortization	532
Identifiable Intangible Assets, Net	$ 8,938	$ 114
Weighted-Average Useful Life (Year)	7 years 10 months 24 days
Accumulated amortization	$ (532)
Intangible assets, net	8,938	114
Patents [Member]
Gross Carrying Amount	4,575	300
Accumulated amortization	(368)	186
Identifiable Intangible Assets, Net	$ 4,207	$ 114
Weighted-Average Useful Life (Year)	7 years 3 months 18 days	5 years 2 months 12 days
Accumulated amortization	$ 368	$ (186)
Intangible assets, net	4,207	$ 114
Defensive Assets [Member]
Gross Carrying Amount	4,895
Accumulated amortization	(164)
Identifiable Intangible Assets, Net	$ 4,731
Weighted-Average Useful Life (Year)	8 years 4 months 24 days
Accumulated amortization	$ 164
Intangible assets, net	$ 4,731