Note 10 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Revenues		$ 15,337	$ 15,683
Cost of revenue		17,339	17,211
Segment profit (loss)		(2,002)	(1,528)
Depreciation and amortization		5,215	5,282
Capital expenditures		593	361
Identifiable assets	[1]	21,869	26,342
Depreciation and amortization		5,215	5,282
Production Services [Member]
Revenues		9,012	7,714
Cost of revenue		9,734	8,410
Segment profit (loss)		(722)	(696)
Depreciation and amortization		2,397	2,378
Capital expenditures		306	176
Identifiable assets	[1]	12,357	12,353
Depreciation and amortization		2,397	2,378
Completion Services [Member]
Revenues		6,325	7,969
Cost of revenue		7,605	8,801
Segment profit (loss)		(1,280)	(832)
Depreciation and amortization		2,415	2,512
Capital expenditures		276	185
Identifiable assets	[1]	9,007	13,050
Depreciation and amortization		2,415	2,512
Unallocated and Other Segments [Member]
Revenues		0	0
Cost of revenue		0	0
Segment profit (loss)		0	0
Depreciation and amortization		403	392
Capital expenditures		11	0
Identifiable assets	[1]	505	939
Depreciation and amortization		$ 403	$ 392

[1] Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment, net; net right-of-use lease assets; assets held for sale; and other assets.