Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 37,169	$ 37,434	$ 112,709	$ 148,407
Cost of products sold	34,862	41,861	108,486	145,988
Gross margin	2,307	(4,427)	4,223	2,419
Selling, general and administrative expenses	5,010	4,153	15,392	15,458
Operating loss	(2,703)	(8,580)	(11,169)	(13,039)
Interest expense and other financing costs	539	642	1,581	2,401
Gain on extinguishment of debt	(10,000)		(10,000)
Other expense (income), net	9	(288)	32	(302)
Income (loss) before income taxes	6,749	(8,934)	(2,782)	(15,138)
Income taxes	(1,141)	(1,934)	(3,650)	(3,396)
Net income (loss)	$ 7,890	$ (7,000)	$ 868	$ (11,742)
Net income (loss) per common share - Basic	$ 0.88	$ (0.79)	$ 0.10	$ (1.33)
Net income (loss) per common share - Diluted	$ 0.87	$ (0.79)	$ 0.10	$ (1.33)
Weighted average shares of common stock outstanding
Basic	8,917,858	8,829,732	8,902,484	8,813,880
Diluted	9,082,371	8,829,732	9,050,847	8,813,880