Note 12 - Segment Reporting - Revenues by Geography (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue		$ 3,087	$ 2,141	$ 8,230	$ 11,527
Production Services [Member]
Revenue		2,229	1,383	4,073	4,585
Completion Services [Member]
Revenue		858	758	4,157	6,942
Rocky Mountain Region [Member] | Production Services [Member]
Revenue	[1]	588	348	1,032	1,541
Rocky Mountain Region [Member] | Completion Services [Member]
Revenue	[1]	755	711	2,707	5,717
Central USA Region [Member] | Production Services [Member]
Revenue	[2]	1,414	943	2,654	2,816
Central USA Region [Member] | Completion Services [Member]
Revenue	[2]	0	(2)	0	107
Eastern USA Region [Member] | Production Services [Member]
Revenue	[3]	227	92	387	228
Eastern USA Region [Member] | Completion Services [Member]
Revenue	[3]	$ 103	$ 49	$ 1,450	$ 1,118

[1] Includes the D-J Basin/Niobrara field (northeastern Colorado and southeastern Wyoming), the San Juan Basin (southeastern Colorado and northeastern New Mexico, the Powder River and Green River Basins (northeastern and southwestern Wyoming), the Bakken area (western North Dakota and eastern Montana).

[2] Includes the Eagle Ford Shale in Southern Texas and the East Texas Oil Field beginning during the second quarter of 2021.

[3] Consists of the southern region of the Marcellus Shale formation (southwestern Pennsylvania and northern West Virginia) and the Utica Shale formation (eastern Ohio).