Note 11 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues		$ 5,143	$ 9,386
Cost of Revenue		5,109	8,465
Segment (Loss) Profit		34	921
Depreciation and amortization		1,336	1,396
Capital Expenditures		45	164
Identifiable assets	[1]	26,307	35,973
Production Services [Member]
Revenues		1,844	3,202
Cost of Revenue		1,967	3,494
Segment (Loss) Profit		(123)	(292)
Depreciation and amortization		528	671
Capital Expenditures		19	83
Identifiable assets	[1]	10,842	17,662
Completion Services [Member]
Revenues		3,299	6,184
Cost of Revenue		3,142	4,971
Segment (Loss) Profit		157	1,213
Depreciation and amortization		712	647
Capital Expenditures		26	81
Identifiable assets	[1]	14,636	17,033
Unallocated and Other Segments [Member]
Revenues
Cost of Revenue
Segment (Loss) Profit
Depreciation and amortization		96	78
Capital Expenditures
Identifiable assets	[1]	$ 829	$ 1,278

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