Note 8 - Leases - Operating Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Operating lease right-of-use assets	$ 1,588	$ 1,598
Current portion of obligations under operating leases	519	534
Long-term portion of obligations under operating leases	1,069	1,064
Total obligations under operating leases	1,588	1,598
Leased property under finance leases	12,016	11,978
Less accumulated amortization	(6,715)	(6,588)
Property and equipment under finance leases, net	5,301	5,390
Current portion of obligations under finance leases	157	167
Long-term portion of obligations under finance leases	493	496
Total obligations under finance leases	$ 650	$ 663