Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Net sales	$ 368,253	$ 559,591
Costs and expenses:
Cost of materials (exclusive of depreciation)	269,126	418,806
Warehouse, processing and delivery expense	59,460	77,567
Sales, general and administrative expense	52,813	64,557
Depreciation expense	7,872	8,759
Impairment of goodwill	2,676	0
Total costs and expenses	391,947	569,689
Operating loss	(23,694)	(10,098)
Interest expense, net	25,477	39,902
Unrealized gain on embedded debt conversion option	(2,010)	0
Other (income)/expense, net	(3,487)	(6,586)
Loss before income taxes	(43,674)	(43,414)
Income tax benefit	(3,014)	(4,899)
Net loss	$ (40,660)	$ (38,515)
Basic and diluted loss per common share (in usd per share)	$ (7.27)	$ (175.87)
Comprehensive (loss) income:
Net loss	$ (40,660)	$ (38,515)
Change in unrecognized pension and postretirement benefit costs	(931)	2,082
Foreign currency translation adjustments, net of tax	2,543	(1,108)
Comprehensive loss	$ (39,048)	$ (37,541)