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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Income Statement [Abstract]    
Revenues $ 146,649 $ 207,683
Cost of goods sold 142,450 170,539
Gross profit (loss) 4,199 37,144
Research and development expenses 447 459
Selling, general and administrative expenses 12,361 12,595
Operating income (loss) (8,609) 24,090
Other income (expense)    
Interest rate expense (10,164) (10,052)
Amortization expense (6,715) (6,038)
Loss on debt extinguishment (330) (1,346)
Loss on sale or disposal of assets 0 (119)
Loss on impairment of goodwill and intangible assets (1,044) 0
Other income (expense) (270) 604
Income (loss) before income taxes (27,132) 7,139
Income tax (expense) benefit (6) (6)
Net income (loss) (27,138) 7,133
Other comprehensive income    
Foreign currency translation adjustment (217) (46)
Comprehensive income (loss) $ (27,355) $ 7,087
Net income(loss) per common share    
Basic $ (1.37) $ 0.35
Diluted $ (1.37) $ 0.34
Weighted average shares outstanding    
Basic 19,823 20,371
Diluted 19,823 21,047