Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Equipment sales	$ 1,577	$ 14,869	$ 31,304	$ 44,788
Chemicals	717	670	3,844	1,717
Consulting services and other	0	171	0	492
Total revenues	2,294	15,710	35,148	46,997
Operating expenses:
Equipment sales cost of revenue, exclusive of depreciation and amortization	1,467	12,704	28,260	35,175
Chemicals cost of revenue, exclusive of depreciation and amortization	574	469	2,977	865
Consulting services and other cost of revenue, exclusive of depreciation and amortization	0	86	0	299
Payroll and benefits	1,679	2,809	5,894	10,567
Rent and occupancy	255	508	555	1,534
Legal and professional fees	1,062	1,615	3,316	6,581
General and administrative	862	818	2,934	2,920
Research and development, net	252	(524)	30	(667)
Depreciation and amortization	87	138	687	593
Total operating expenses	6,238	18,623	44,653	57,867
Operating loss	(3,944)	(2,913)	(9,505)	(10,870)
Other income (expense):
Earnings from equity method investments	12,120	10,735	36,089	30,066
Royalties, related party	2,804	2,064	6,425	3,922
Interest expense	(678)	(969)	(1,999)	(4,496)
Revision in estimated royalty indemnity liability	0	0	3,400	0
Other	(924)	1,278	(908)	3,960
Total other income	13,322	13,108	43,007	33,452
Income before income tax expense	9,378	10,195	33,502	22,582
Income tax expense	3,586	583	12,614	734
Net income	$ 5,792	$ 9,612	$ 20,888	$ 21,848
Earnings per common share (Note 1):
Basic (in dollars per share)	$ 0.28	$ 0.44	$ 0.96	$ 0.99
Diluted (in dollars per share)	$ 0.28	$ 0.43	$ 0.96	$ 0.97
Weighted-average number of common shares outstanding:
Basic (in shares)	20,808	21,740	21,569	21,926
Diluted (in shares)	20,854	22,098	21,598	22,209
Cash dividends declared per common share outstanding (in dollars per share)	$ 0.25	$ 0	$ 0.5	$ 0