Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 40,545	$ 24,706	$ 140,804	$ 115,766
Cost of sales	32,816	19,636	151,252	80,811
Gross profit	7,729	5,070	(10,448)	34,955
Operating expenses:
Selling, general and administrative	7,356	3,473	26,038	9,823
Amortization	742	121	2,225	364
Total operating expenses	8,098	3,594	28,263	10,187
Operating income (loss)	(369)	1,476	(38,711)	24,768
Interest expense	4,064	24	10,616	170
(Loss) income before income taxes	(4,433)	1,452	(49,327)	24,598
Income tax expense (benefit)	9,447	(652)	(1,775)	8,236
Net (loss) income	$ (13,880)	$ 2,104	$ (47,552)	$ 16,362
Net (loss) income per common share – Basic	$ (0.33)	$ 0.05	$ (1.12)	$ 0.39
Net (loss) income per common share – Diluted	$ (0.33)	$ 0.05	$ (1.12)	$ 0.38
Weighted average number of shares outstanding – Basic	42,530,476	41,869,528	42,445,926	41,648,439
Weighted average number of shares outstanding – Diluted	42,530,476	43,463,982	42,445,926	43,173,427