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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:    
Net loss from operations $ (45,147,883) $ (55,765,455)
Adjustments to reconcile net loss to net cash used in operating activities:    
Change in fair value of warrants and embedded derivative   1,870,923
Stock based compensation 3,895,781 7,599,496
Depreciation and amortization 249,583 66,663
Amortization of marketable securities discount (530,104) (497,267)
Cloud computing arrangement implementation costs (1,114,568) (107,754)
Noncash lease expense, net 57,780  
Noncash portion of litigation settlement 16,692  
Other 76,279 12,136
Changes in operating assets and liabilities:    
Accounts receivable, net (228,541) (164,390)
Inventories (4,961,770) (1,621,615)
Prepaid expenses and other assets 859,204 (1,347,410)
Accounts payable 2,797,727 1,858,519
Accrued expense and other current liabilities (1,036,721) 1,047,059
Deferred rent   (61,254)
Net cash used in operating activities (45,066,541) (47,110,349)
Cash flows from investing activities:    
Purchase of marketable securities (37,224,879) (81,058,590)
Proceeds from maturities of marketable securities 88,266,000 44,509,684
Purchases of property and equipment (69,675) (278,921)
Net cash provided by (used in) investing activities 50,971,446 (36,827,827)
Cash flows from financing activities:    
Proceeds from note issued 807,347  
Repayments of note issued (695,469)  
Sale of common stock, net of related expenses   78,334,457
Proceeds from shares issued in connection with employee stock purchase plan 48,965  
Net cash provided by financing activities 160,843 78,334,457
Effect of changes in exchange rates on cash and cash equivalents (102,241) (20,191)
Net increase (decrease) in cash and cash equivalents 5,963,507 (5,623,910)
Cash and cash equivalents – beginning of period 7,600,284 13,224,194
Cash and cash equivalents – end of period 13,563,791 7,600,284
Supplemental schedule of noncash financing activity:    
Reclass of warrant liability to additional paid in capital   4,110,467
Reclass of deferred financing costs to additional paid in capital   856,985
Stock dividend distribution in connection with IPO   3,629,092
Capitalized cloud computing arrangement costs included in accounts payable and accrued expenses   287,650
Cash paid during the year for:    
Income taxes paid 29,542 45,641
Interest paid $ 3,457  
Series A Preferred Units    
Supplemental schedule of noncash financing activity:    
Equity converted to common stock   53,518,463
Series B Preferred Units    
Supplemental schedule of noncash financing activity:    
Equity converted to common stock   68,755,544
Common Units    
Supplemental schedule of noncash financing activity:    
Equity converted to common stock   $ 40,180,619