Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Cash Flows

v3.21.1
Consolidated Statements of Cash Flows - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities      
Net loss $ (28,155,673) $ (12,794,493) $ (37,684,424)
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation 168,249 169,159 151,292
Stock-based compensation expense 2,576,456 1,446,549 1,555,523
Issuance costs allocated to warrants 2,174,653    
Change in fair value of warrant liabilities (8,056,258) (14,712,685) 7,232,226
Decrease in deferred rent     (25,058)
Net amortization of premium paid on marketable securities 378,310 171,111 486,736
Changes in operating assets and liabilities:      
Decrease (increase) in prepaid expenses and other current and non-current assets 1,738,433 (1,262,809) 897,447
(Decrease) increase in accounts payable, accrued liabilities and other liabilities (4,010,485) (444,725) 1,127,409
Net cash used in operating activities (33,186,315) (27,427,893) (26,258,849)
Cash flows from investing activities      
Purchases of marketable securities (47,555,466)   (23,846,176)
Proceeds from maturities of marketable securities 20,150,848 21,991,125 41,130,888
Purchases of property and equipment   (19,999) (133,488)
Net cash (used in) provided by investing activities (27,404,618) 21,971,126 17,151,224
Cash flows from financing activities      
Proceeds from issuance of equity securities 55,499,990 23,034,000 11,500,000
Payment of financing costs of securities sold (3,636,963) (1,713,410) (1,072,607)
Proceeds from exercise of warrants 28,665   5,503
Net cash provided by financing activities 51,891,692 21,320,590 10,432,896
Net (decrease) increase in cash and cash equivalents (8,699,241) 15,863,823 1,325,271
Cash and cash equivalents at beginning of period 24,184,140 8,320,317 6,995,046
Cash and cash equivalents at end of period 15,484,899 24,184,140 $ 8,320,317
Supplemental disclosures of cash flow information:      
Prepaid expenses in accrued liabilities   4,096,832  
Right-of-use assets obtained in exchange for lease obligations   4,148,672  
Leasehold improvement obtained in exchange for lease incentive obligations   $ 189,227  
Issuance of warrants to purchase common stock $ 31,391,369