Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues	$ 34,605	$ 28,637	$ 62,772	$ 50,740
Cost of sales	24,114	21,425	44,759	38,003
Gross profit	10,491	7,212	18,013	12,737
Operating expenses:
Selling and marketing	1,019	1,054	2,136	2,014
General and administrative	1,328	1,397	2,714	2,692
Total operating expenses	2,347	2,451	4,850	4,706
Operating income	8,144	4,761	13,163	8,031
Interest expense	352	236	623	443
Income before income taxes	7,792	4,525	12,540	7,588
Income tax expense	2,962	1,714	4,766	2,884
Net income	$ 4,830	$ 2,811	$ 7,774	$ 4,704
Net income per common share - Basic	$ 0.15	$ 0.09	$ 0.24	$ 0.14
Net income per common share - Diluted	$ 0.14	$ 0.08	$ 0.23	$ 0.14
Weighted average number of shares outstanding - Basic	33,128,518	32,542,672	33,008,588	32,454,175
Weighted average number of shares outstanding - Diluted	34,270,337	34,383,092	34,045,125	34,254,901