Note 7 - Leases - Operating Leases Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Operating lease right-of-use assets	$ 1,078	$ 1,383
Leased property under finance leases	14,237	13,554
Current portion of obligations under operating leases	363	365
Less accumulated amortization	(8,007)	(7,907)
Long-term portion of obligations under operating leases	715	1,018
Leased property under finace leases, net	6,230	5,647
Total obligations under operating leases	1,078	1,383
Current portion of obligations under finance leases	362	201
Long-term portion of obligations under finance leases	1,220	707
Total obligations under finance leases	$ 1,582	$ 908