Note 2 - Basis of Presentation ad Summary of Significant Accounting Policies - Summary of Other Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Other property and equipment, net	$ 3,483	$ 3,572
Land [Member]
Other property and equipment, net	2,091	2,139
Transportation Equipment [Member]
Other property and equipment, net	673	689
Building [Member]
Other property and equipment, net	520	530
Leasehold Improvements [Member]
Other property and equipment, net	197	209
Field Equipment [Member]
Other property and equipment, net	2	4
Furniture and Fixtures [Member]
Other property and equipment, net	$ 0	$ 1