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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Income Statement [Abstract] |  |  |  |  |  |
Revenues | $ 10,927 | $ 9,025 | $ 29,781 | $ 32,533 | $ 47,698 | $ 68,170
Cost of goods sold | 5,931 | 4,865 | 17,799 | 17,136 | 21,003 | 29,934
Gross profit | 4,996 | 4,160 | 11,982 | 15,397 | 26,695 | 38,236
Operating expenses: |  |  |  |  |  |
Salaries, benefits and payroll taxes | 1,316 | 1,164 | 3,611 | 3,991 | 5,055 | 5,088
Depreciation and amortization | 102 | 107 | 283 | 276 | 388 | 160
Selling, general and administrative | 1,044 | 1,044 | 2,970 | 3,591 | 4,669 | 7,222
Total operating expenses | 2,462 | 2,315 | 6,864 | 7,858 | 10,112 | 12,470
Operating income | 2,534 | 1,845 | 5,118 | 7,539 | 16,583 | 25,766
Other (expenses) income: |  |  |  |  |  |
Preferred stock interest expense | (1,813) | (1,256) | (4,936) | (3,690) | (5,078) | (5,601)
Other interest expense | (845) | (575) | (2,517) | (1,624) | (2,748) | (2,231)
Other income | 33 | 18 | 222 | 369 | 362 | 370
Total other expenses, net | (2,625) | (1,813) | (7,231) | (4,945) | (7,464) | (7,462)
Loss on extinguishment of debt |  |  |  |  |  | (1,230)
(Loss) income before income tax expense (benefit) | (91) | 32 | (2,113) | 2,594 | 9,119 | 17,074
Income tax expense (benefit) | 5 | (1,764) | (51) | (131) | 4,129 | 9,518
Net (loss) income | $ (96) | $ 1,796 | $ (2,062) | $ 2,725 | $ 4,990 | $ 7,556
Net (loss) income per common share: |  |  |  |  |  |
Basic | $ 0.00 | $ 0.08 | $ (0.09) | $ 0.12 | $ 0.23 | $ 0.34
Diluted | $ 0.00 | $ 0.07 | $ (0.09) | $ 0.10 | $ 0.19 | $ 0.29
Weighted-average number of common shares: |  |  |  |  |  |
Basic | 22,189,000 | 22,112,261 | 22,189,000 | 22,112,261 | 22,114,400 | 22,039,600
Diluted | 22,189,000 | 26,387,535 | 22,189,000 | 26,387,535 | 26,400,000 | 26,243,800

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