Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 7,206	$ 7,934	$ 33,446	$ 28,214
Expenses
Cost of Revenue	7,724	7,060	25,276	21,253
Sales, general, and administrative expenses	1,460	1,236	3,078	2,589
Patent litigation and defense costs	1	55	10	75
Severance and transition costs	0	593		633
Loss (gain) on disposal of assets	12	(53)	12	(53)
Impairment loss		0	127	0
Depreciation and amortization	1,736	1,520	3,419	3,019
Total operating expenses	10,933	10,411	31,922	27,516
(Loss) Income from Operations	(3,727)	(2,477)	1,524	698
Other (Expense) Income
Interest expense	(658)	(511)	(1,542)	(1,011)
Other income (expense)	1,208	(85)	1,144	(506)
Total other income (expense)	550	(596)	(398)	(1,517)
(Loss) income from continuing operations before tax benefit	(3,177)	(3,073)	1,126	(819)
Income tax (expense) benefit	(32)	(32)	(32)	(32)
Income from continuing operations	(3,209)	(3,105)	1,094	(851)
Loss from operations of discontinued operations		(177)		(390)
Income tax benefit
Loss from discontinued operations		(177)	0	(390)
Net income (loss)	$ (3,209)	$ (3,282)	$ 1,094	$ (1,241)
(Loss) earnings from continuing operations per common share - basic (in dollars per share)	$ (0.06)	$ (0.06)	$ 0.02	$ (0.02)
Loss from discontinued operations per common share - basic (in dollars per share)
Net (loss) income per share - basic (in dollars per share)	(0.06)	(0.06)	0.02	(0.02)
(Loss) Earnings from continuing operations per common share - diluted (in dollars per share)	(0.06)	(0.06)	0.02	(0.02)
Loss from discontinued operations per common share - diluted (in dollars per share)
Net (loss) income per share - diluted (in dollars per share)	$ (0.06)	$ (0.06)	$ 0.02	$ (0.02)
Basic weighted average number of common shares outstanding (in shares)	54,978	51,677	54,589	51,413
Add: Dilutive shares (in shares)			1,215
Diluted weighted average number of common shares outstanding (in shares)	54,978	51,677	55,804	51,413
Well Enhancement Services Segment [Member]
Revenue	$ 6,339	$ 7,005	$ 31,151	$ 26,290
Expenses
Cost of Revenue	6,150	5,900	21,362	18,991
Water Transfer Services Segment [Member]
Revenue	867	929	2,295	1,924
Expenses
Cost of Revenue	1,287	979	3,472	1,936
Unallocated and Other Segments [Member]
Expenses
Cost of Revenue	$ 287	$ 181	$ 442	$ 326