Note 5 - Leases - Additional Information Regarding Financing and Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Amortization of ROU assets, finance lease	$ 77	$ 97
Interest on lease liabilities, finance lease	9	14
Operating lease expense	629	1,157
Short term lease expense	279	250
Financing cash flows	87	109
Operating cash flows	580	1,140
Finance leases	58	0
Operating leases	$ 1,749	$ 332