Note 7 - Leases - Operating Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Operating lease right-of-use assets	$ 1,191	$ 1,598
Leased property under finance leases	12,100	11,978
Current portion of obligations under operating leases	478	534
Less accumulated amortization	(6,966)	(6,588)
Long-term portion of obligations under operating leases	713	1,064
Leased property under finace leases, net	5,134	5,390
Total obligations under operating leases	1,191	1,598
Current portion of obligations under finance leases	130	167
Long-term portion of obligations under finance leases	401	496
Total obligations under finance leases	$ 531	$ 663