Note 5 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Operating lease costs		$ 676	$ 578	$ 1,405	$ 1,071
Other		438	120	805	247
Total lease costs		1,114	698	2,210	1,318
Operating cash flows from operating leases		533	698	1,466	1,010
ROU assets obtained in exchange for new operating lease liabilities	[1]	$ 48	$ 744	$ 1,058	$ 3,684
Weighted-average remaining lease term (in years) (Year)		2 years 4 months 24 days		2 years 4 months 24 days		2 years 9 months 18 days
Weighted-average discount rate		2.00%		2.00%		2.00%

[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).