Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues	$ 52,231	$ 34,605	$ 91,061	$ 62,772
Cost of sales	34,811	24,114	61,174	44,759
Gross profit	17,420	10,491	29,887	18,013
Operating expenses:
Selling and marketing	1,110	1,019	2,149	2,136
General and administrative	2,410	1,328	4,445	2,714
Total operating expenses	3,520	2,347	6,594	4,850
Operating income	13,900	8,144	23,293	13,163
Interest expense	61	352	146	623
Income before income taxes	13,839	7,792	23,147	12,540
Income tax expense	5,314	2,962	8,888	4,766
Net income	$ 8,525	$ 4,830	$ 14,259	$ 7,774
Net income per common share - Basic	$ 0.21	$ 0.15	$ 0.34	$ 0.24
Net income per common share - Diluted	$ 0.20	$ 0.14	$ 0.33	$ 0.23
Weighted average number of shares outstanding - Basic	41,567,848	33,128,518	41,537,894	33,008,588
Weighted average number of shares outstanding - Diluted	43,550,226	34,270,337	43,490,914	34,045,125