Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 37,434	$ 56,568	$ 148,407	$ 187,836
Cost of products sold	41,861	51,260	145,988	166,052
Gross margin	(4,427)	5,308	2,419	21,784
Selling, general and administrative expenses	4,153	4,525	15,458	15,095
Operating (loss) income	(8,580)	783	(13,039)	6,689
Interest expense and other financing costs	642	1,045	2,401	2,980
Other income, net	(288)	(452)	(302)	(421)
(Loss) income before income taxes	(8,934)	190	(15,138)	4,130
(Benefit) provision for income taxes	(1,934)	(577)	(3,396)	55
Net (loss) income	$ (7,000)	$ 767	$ (11,742)	$ 4,075
Net (loss) income per common share - Basic	$ (0.79)	$ 0.09	$ (1.33)	$ 0.46
Net (loss) income per common share - Diluted	$ (0.79)	$ 0.09	$ (1.33)	$ 0.46
Weighted average shares of common stock outstanding
Basic	8,829,732	8,787,837	8,813,880	8,780,590
Diluted	8,829,732	8,879,441	8,813,880	8,870,240