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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES      
Net loss $ (85,077,024) $ (54,217,210) $ (28,419,313)
Adjustments to reconcile net loss to net cash flows used in operating activities:      
Depreciation 29,959 28,987 47,883
Amortization of intangible assets 32,441 23,480 10,262
Provision for (recovery of) doubtful accounts 22,157 (5,436) (15,493)
Amortization of debt discount     1,102,680
Stock based compensation 7,189,699 4,970,312 3,844,155
Amortization of deferred financing costs   260,027 1,451,934
Loan guaranty costs     2,944
Changes in operating assets and liabilities:      
Accounts receivable (917,656) (458,028) (1,068,619)
Inventory 491,960 (138,495) 571,592
Other current assets (773,532) 680,281 (1,386,319)
Other assets (17,442) (37,309) (565,706)
Accounts payable (3,200,955) 4,212,912 472,851
Deferred revenue (522,613) (1,079,967) 457,828
Other current liabilities 3,698,887 239,450 2,875,320
Other liabilities     (150,068)
Net cash flows used in operating activities (79,044,119) (45,520,996) (20,768,069)
CASH FLOWS FROM INVESTING ACTIVITIES      
Patent costs (419,104) (586,480) (439,034)
Purchase of fixed assets (165,257) (30,962) (40,790)
Refund (payment) of security deposit   10,686 (103,737)
Net cash flows used in investing activities (584,361) (606,756) (583,561)
CASH FLOWS FROM FINANCING ACTIVITIES      
Proceeds from sale of common stock, net of costs 91,374,649 42,771,353 78,650,353
Proceeds from exercise of options 1,232,579 345,746 30,910
Proceeds from exercise of warrants 366,000 181,000  
Proceeds bank line of credit     500,000
Repayment of bank line of credit     (500,000)
Repayment of notes payable     (4,691,847)
Net cash flows provided by financing activities 92,973,228 43,298,099 73,989,416
Increase (decrease) in cash 13,344,748 (2,829,653) 52,637,786
Cash, beginning of period 51,361,607 54,191,260 1,553,474
Cash, end of period $ 64,706,355 $ 51,361,607 54,191,260
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Cash paid for interest     212,853
SUPPLEMENTAL SCHEDULE OF NON-CASH FINANCING ACTIVITIES:      
Warrants issued for financing     1,711,956
Warrants issued for services     $ 462,196