Note 13 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Revenues		$ 43,026	$ 42,760
Cost of Revenue		34,607	33,478
Segment Profit		8,419	9,282
Depreciation and amortization		5,692	4,871
Capital Expenditures		1,191	1,058
Identifiable assets (1)	[1]	38,774	41,870
Production Services [Member]
Revenues		14,704	14,538
Cost of Revenue		13,575	12,864
Segment Profit		1,129	1,674
Depreciation and amortization		2,648	2,308
Capital Expenditures		399	460
Identifiable assets (1)	[1]	18,233	20,229
Completion Services [Member]
Revenues		28,322	28,222
Cost of Revenue		21,032	20,614
Segment Profit		7,290	7,608
Depreciation and amortization		2,922	2,550
Capital Expenditures		419	524
Identifiable assets (1)	[1]	19,121	21,213
Unallocated and Other Segments [Member]
Revenues
Cost of Revenue
Segment Profit
Depreciation and amortization		122	13
Capital Expenditures		373	74
Identifiable assets (1)	[1]	$ 1,420	$ 428

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