Note 7 - Leases - Operating Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Operating lease right-of-use assets	$ 1,096	$ 1,270
Leased property under finance leases	13,147	13,131
Current portion of obligations under operating leases	387	432
Less accumulated amortization	(7,660)	(7,420)
Long-term portion of obligations under operating leases	709	838
Leased property under finace leases, net	5,487	5,711
Total obligations under operating leases	1,096	1,270
Current portion of obligations under finance leases	216	198
Long-term portion of obligations under finance leases	610	598
Total obligations under finance leases	$ 826	$ 796