Note 7 - Leases - Operating Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Operating lease right-of-use assets	$ 1,406	$ 1,386
Leased property under finance leases	12,280	12,004
Current portion of obligations under operating leases	432	424
Less accumulated amortization	(7,124)	(7,003)
Long-term portion of obligations under operating leases	974	962
Leased property under finace leases, net	5,156	5,001
Total obligations under operating leases	1,406	1,386
Current portion of obligations under finance leases	139	115
Long-term portion of obligations under finance leases	509	381
Total obligations under finance leases	$ 648	$ 496