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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Statement [Abstract] |  |  |
Revenues, net | $ 20,142,898 | $ 15,026,219 | $ 8,775,598
Cost of goods sold | 4,506,673 | 3,671,803 | 1,959,597
Gross profit | 15,636,225 | 11,354,416 | 6,816,001
Operating expenses: |  |  |
Sales, general, and administrative | 28,721,236 | 22,124,072 | 19,014,837
Research and development | 72,042,774 | 43,218,938 | 13,551,263
Depreciation and amortization | 62,400 | 52,467 | 58,145
Total operating expense | 100,826,410 | 65,395,477 | 32,624,245
Operating loss | (85,190,185) | (54,041,061) | (25,808,244)
Other income (expense): |  |  |
Miscellaneous income, net | 95,719 | 46,569 | 34,544
Interest income | 17,442 | 37,309 | 27,234
Financing costs |  | (260,027) | (1,503,922)
Interest expense |  |  | (1,165,981)
Loan guaranty costs |  |  | (2,944)
Total other income (expense) | 113,161 | (176,149) | (2,611,069)
Loss before income taxes | (85,077,024) | (54,217,210) | (28,419,313)
Net loss | $ (85,077,024) | $ (54,217,210) | $ (28,419,313)
Loss per share, basic and diluted: |  |  |
Net loss per share, basic and diluted | $ (0.49) | $ (0.36) | $ (0.22)
Weighted average number of common shares outstanding, basic and diluted | 173,174,229 | 149,727,228 | 127,569,731

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