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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (93,226,179) $ (55,498,050)
Adjustments to reconcile net loss to net cash flows used in operating activities:    
Depreciation of fixed assets 121,423 104,622
Amortization of intangible assets 77,123 52,321
Provision for doubtful accounts 231,475 1,555
Share-based compensation 6,388,635 5,037,783
Amortization of deferred financing costs 149,909  
Changes in operating assets and liabilities:    
Accounts receivable (8,705,325) 106,509
Inventory (892,863) (217,196)
Other current assets 1,233,482 (831,623)
Accounts payable 7,284,493 (3,159,145)
Accrued interest 59,375  
Accrued expenses and other current liabilities 8,611,611 (946,853)
Net cash used in operating activities (78,666,841) (55,350,077)
CASH FLOWS FROM INVESTING ACTIVITIES    
Payment for intellectual property license (20,000,000)  
Patent costs (748,906) (439,770)
Purchase of fixed assets (66,295) (35,849)
Payment of security deposit (11,485)
Net cash used in investing activities (20,826,686) (475,619)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from sale of common stock, net of costs 89,907,797 68,572,635
Proceeds from term loan 75,000,000  
Payment of deferred financing fees (3,786,918)  
Proceeds from exercise of options 1,236,313 212,615
Proceeds from exercise of warrants   3,798,999
Net cash provided by financing activities 162,357,192 72,584,249
Increase in cash 62,863,665 16,758,553
Cash, beginning of period 127,135,628 131,534,101
Cash, end of period 189,999,293 $ 148,292,654
Supplemental disclosure of cash flow information    
Interest paid $ 1,759,316