Note 10 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues		$ 3,764	$ 3,729	$ 13,556	$ 12,641
Cost of revenues		3,415	3,916	9,946	10,813
Segment profit		349	(187)	3,610	1,828
Depreciation and amortization		288	945	1,056	1,916
Capital expenditures		15	34	92	84
Identifiable assets	[1]	9,219	12,291	9,219	12,291
Production Services [Member]
Revenues		2,618	2,889	5,103	5,752
Cost of revenues		2,499	2,601	4,403	4,775
Segment profit		119	288	700	977
Depreciation and amortization		233	428	544	736
Capital expenditures		12	20	48	41
Identifiable assets	[1]	4,660	7,050	4,660	7,050
Completion Services [Member]
Revenues		1,146	840	8,453	6,889
Cost of revenues		916	1,315	5,543	6,038
Segment profit		230	(475)	2,910	851
Depreciation and amortization		53	312	491	761
Capital expenditures		3	14	44	43
Identifiable assets	[1]	4,209	5,144	4,209	5,144
Unallocated and Other Segments [Member]
Revenues		0	0	0	0
Cost of revenues		0	0	0	0
Segment profit		0	0	0	0
Depreciation and amortization		2	205	21	419
Capital expenditures		0	0	0	0
Identifiable assets	[1]	$ 350	$ 97	$ 350	$ 97

[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.