Note 7 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		12 Months Ended		22 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Oct. 26, 2020
Operating lease costs		$ 1,488	$ 1,509
Other		300	465
Total lease costs		1,788	$ 1,974
Operating cash flows from operating leases		1,526		$ 1,364
ROU assets obtained in exchange for new operating lease liabilities (1)	[1]	$ 2,181		$ 3,667
Weighted-average remaining lease term (in years) (Year)		2 years 8 months 12 days	2 years 1 month 6 days
Weighted-average discount rate		2.70%	3.70%

[1] For the year ended December 31, 2019, the amount includes $2.3 million for operating leases existing on January 1, 2019, the adoption date of ASU No. 2016-02, Leases (Topic 842).