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Condensed Statements of Cash Flows - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cash flows from operating activities:    
Net loss $ (10,719,507) $ (19,010,212)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 1,270,912 1,387,293
Depreciation 35,419 27,075
Fair value of shares issued for commitment fee 355,555  
Loss on disposal of property and equipment   52,718
Non-cash interest expense 917  
Changes in operating assets and liabilities    
Prepaid expenses and other current assets 332,352 282,791
Accounts payable (126,624) 505,003
Accrued expenses 150,623 (1,374,449)
Other non-current assets   (10,620)
Net cash used in operating activities (8,700,353) (18,140,401)
Cash flows from investing activities:    
Purchase of property and equipment   (134,960)
Net cash used in investing activities   (134,960)
Cash flows from financing activities:    
Proceeds from issuance of common stock, net of issuance costs 1,941,095  
Proceeds from Paycheck Protection Program loan 562,479  
Proceeds from the exercise of stock options   92,272
Net cash provided by financing activities 2,503,574 92,272
Net decrease in cash and cash equivalents (6,196,779) (18,183,089)
Cash and cash equivalents, beginning of period 12,077,640 41,671,284
Cash and cash equivalents, end of period $ 5,880,861 $ 23,488,195