Note 12 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues		$ 3,087	$ 2,141	$ 8,230	$ 11,527
Cost of Revenue		3,695	3,330	8,804	11,795
Segment (Loss) Profit		(608)	(1,189)	(574)	(268)
Depreciation and amortization		1,337	1,310	2,673	2,706
Capital Expenditures		150	142	195	306
Identifiable assets	[1]	23,552	29,448	23,552	29,448
Production Services [Member]
Revenues		2,229	1,383	4,073	4,585
Cost of Revenue		2,346	1,814	4,313	5,308
Segment (Loss) Profit		(117)	(431)	(240)	(723)
Depreciation and amortization		572	647	1,100	1,317
Capital Expenditures		70	76	89	159
Identifiable assets	[1]	10,592	13,228	10,592	13,228
Completion Services [Member]
Revenues		858	758	4,157	6,942
Cost of Revenue		1,349	1,516	4,491	6,487
Segment (Loss) Profit		(491)	(758)	(334)	455
Depreciation and amortization		661	567	1,373	1,214
Capital Expenditures		80	66	106	147
Identifiable assets	[1]	12,242	15,085	12,242	15,085
Unallocated and Other Segments [Member]
Revenues		0	0	0	0
Cost of Revenue		0	0	0	0
Segment (Loss) Profit		0	0	0
Depreciation and amortization		104	96	200	175
Capital Expenditures		0	0	0	0
Identifiable assets	[1]	$ 718	$ 1,135	$ 718	$ 1,135

[1] Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment, net; and other assets.