Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenues	$ 26,240	$ 20,280
Expenses
Cost of Revenue	17,552	14,193
Selling, general, and administrative expenses	1,618	1,353
Patent litigation and defense costs	9	20
Severance and transition costs	0	40
Impairment loss	(127)	0
Depreciation and amortization	1,683	1,499
Total operating expenses	20,989	17,105
Income from Operations	5,251	3,175
Other Expense
Interest expense	(884)	(500)
Other expense	(64)	(421)
Total other expense	(948)	(921)
Income from continuing operations before tax benefit	4,303	2,254
Income tax (expense) benefit	0	0
Income from continuing operations	4,303	2,254
Loss from operations of discontinued operations	0	(213)
Income tax benefit	0	0
Loss from discontinued operations	0	(213)
Net income	$ 4,303	$ 2,041
Earnings from continuing operations per common share - basic (in dollars per share)	$ 0.08	$ 0.04
Loss from discontinued operations per common share - basic (in dollars per share)
Net income per share - basic (in dollars per share)	0.08	0.04
Earnings from continuing operations per common share - diluted (in dollars per share)	0.08	0.04
Loss from discontinued operations per common share - diluted (in dollars per share)
Net income per share - diluted (in dollars per share)	$ 0.08	$ 0.04
Basic weighted average number of common shares outstanding (in shares)	54,266	51,155
Add: Dilutive shares assuming exercise of options and warrants (in shares)	951	1,793
Diluted weighted average number of common shares outstanding (in shares)	55,217	52,948
Well Enhancement Services Segment [Member]
Revenues
Revenues	$ 24,812	$ 19,285
Expenses
Cost of Revenue	15,212	13,091
Depreciation and amortization	1,387	1,229
Water Transfer Services Segment [Member]
Revenues
Revenues	1,428	995
Expenses
Cost of Revenue	2,185	957
Depreciation and amortization	283	263
Unallocated and Other Segments [Member]
Revenues
Revenues
Expenses
Cost of Revenue	155	145
Depreciation and amortization	$ 13	$ 7