Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 63,737	$ 48,875
Cost of products sold	54,465	44,630
Gross margin	9,272	4,245
Selling, general and administrative expenses	5,207	4,729
Operating income (loss)	4,065	(484)
Interest expense and other financing costs	1,206	1,003
Other (income) expense, net	(43)	(6)
Income (loss) before income taxes	2,902	(1,481)
Provision (benefit) for income taxes	777	(262)
Net income (loss)	$ 2,125	$ (1,219)
Net income (loss) per common share - Basic	$ 0.29	$ (0.17)
Net income (loss) per common share - Diluted	$ 0.28	$ (0.17)
Weighted average shares of common stock outstanding
Basic	7,261,966	7,216,447
Diluted	7,492,972	7,216,447