v3.21.2
Condensed Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES    
Net Loss $ (11,549) $ (11,002)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 47 32
Operating lease right of use asset amortization 136 107
Financing lease right of use asset amortization 211 0
Stock-based compensation 2,334 2,224
Warrant modification expense 0 139
Non cash interest expense 52 0
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets (297) (49)
Long-term prepaid rent 0 (450)
Accounts payable (121) 248
Accrued expenses 104 89
Accrued payroll expenses (271) (308)
Operating lease liability (50) (110)
Deferred revenue 0 (37)
Net cash used in operating activities (9,404) (9,117)
CASH FLOWS FROM INVESTING ACTIVITIES    
Acquisition of property and equipment (102) (56)
Net cash used in investing activities (102) (56)
CASH FLOWS FROM FINANCING ACTIVITIES    
Proceeds from underwritten public offering, net of commission and expenses 0 9,395
Proceeds from at-the-market sale of stock, net of commissions and expenses 243 8,520
Proceeds from exercise of warrants 0 902
Proceeds from exercise of stock options 3,110 782
Net cash provided by financing activities 3,353 19,599
Net increase (decrease) in cash and cash equivalents (6,153) 10,426
Cash and cash equivalents at beginning of period 37,942 14,871
Cash and cash equivalents at end of period 31,789 25,297
Supplemental information:    
Cash paid for interest 0 0
Cash paid for taxes $ 66 $ 0