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CONDENSED CONSOLIDATED INCOME STATEMENTS (UNAUDITED) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Statement [Abstract]    
Revenues $ 25,059 $ 10,359
Cost of goods sold 19,662 5,337
Gross profit 5,397 5,022
Operating expenses:    
Salaries, benefits and payroll taxes 1,697 1,184
Depreciation and amortization 108 129
Selling, general and administrative 2,034 875
Total operating expenses 3,839 2,188
Operating income 1,558 2,834
Other income (expenses):    
Preferred stock interest expense   (1,500)
Other interest expense (111) (795)
Other income 37 80
Total other (expenses), net (74) (2,215)
Income before income tax expense 1,484 619
Income tax expense 515 237
Net income $ 969 $ 382
Net income per common share:    
Basic $ 0.02 $ 0.02
Diluted $ 0.02 $ 0.01
Weighted-average number of common shares:    
Basic 39,697 22,135
Diluted 39,874 26,410