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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (57,620,877) $ (40,833,409)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Depreciation of fixed assets 79,201 69,000
Amortization of intangible assets 46,023 33,888
Provision for (recovery of) doubtful accounts 38,024 (18,106)
Share-based compensation 4,128,440 3,051,357
Amortization of deferred financing costs 30,155  
Changes in operating assets and liabilities:    
Accounts receivable (1,335,209) 1,122,386
Inventory (395,219) (337,694)
Other current assets 2,539,394 (58,601)
Accounts payable 7,329,560 749,520
Accrued interest 501,227  
Accrued expenses and other current liabilities 60,388 (2,443,867)
Net cash used in operating activities (44,598,893) (38,665,526)
CASH FLOWS FROM INVESTING ACTIVITIES    
Patent costs (434,677) (367,602)
Purchase of fixed assets (45,720) (35,849)
Payment of security deposit (11,486)  
Net cash used in investing activities (491,883) (403,451)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from term loan 75,000,000  
Payment of deferred financing fees (3,786,918)  
Proceeds from exercise of options 1,128,996 212,360
Proceeds from exercise of warrants   3,798,999
Net cash provided by financing activities 72,342,078 4,011,359
Increase (decrease) in cash 27,251,302 (35,057,618)
Cash, beginning of period 127,135,628 131,534,101
Cash, end of period $ 154,386,930 $ 96,476,483