Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Other Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other property and equipment, net	$ 3,548	$ 1,600
Land [Member]
Other property and equipment, net	2,139	1,122
Transportation Equipment [Member]
Other property and equipment, net	645	202
Building [Member]
Other property and equipment, net	547	0
Leasehold Improvements [Member]
Other property and equipment, net	210	143
Field Equipment [Member]
Other property and equipment, net	7	8
Technology Equipment [Member]
Other property and equipment, net	$ 0	$ 125