Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Other Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Aug. 22, 2020
Other property and equipment, net	$ 3,587	$ 1,600	$ 436
Land [Member]
Other property and equipment, net	2,139	1,122
Transportation Equipment [Member]
Other property and equipment, net	691	202
Building [Member]
Other property and equipment, net	544	0
Leasehold Improvements [Member]
Other property and equipment, net	206	143
Field Equipment [Member]
Other property and equipment, net	6	8
Furniture and Fixtures [Member]
Other property and equipment, net	1	0
Technology Equipment [Member]
Other property and equipment, net	$ 0	$ 125