Note 5 - Selected Balance Sheet Accounts - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, gross	$ 25,544	$ 25,544
Finite-Lived Intangible Assets, Accumulated Amortization	(24,510)	(23,011)
Finite-Lived Intangible Assets, Net	1,034	2,533
Trademarks Trade Names Licenses and Domains [Member]
Finite-Lived Intangible Assets, gross		16,589
Finite-Lived Intangible Assets, Accumulated Amortization	(16,372)	(15,961)
Finite-Lived Intangible Assets, Net	$ 217	628
Trademarks Trade Names Licenses and Domains [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	3 years
Trademarks Trade Names Licenses and Domains [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years
Finite-Lived Intangible Assets, gross	$ 16,589
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, gross		8,955
Finite-Lived Intangible Assets, Accumulated Amortization	(8,138)	(7,050)
Finite-Lived Intangible Assets, Net	$ 817	$ 1,905
Developed Technology Rights [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Developed Technology Rights [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	7 years
Finite-Lived Intangible Assets, gross	$ 8,955