XML 21 R7.htm IDEA: XBRL DOCUMENT v3.22.1
Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:    
Net loss $ (26,164) $ (21,157)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization expense 121 163
Net amortization of premiums and discounts on investments 240 (9)
Stock-based compensation expense 2,260 1,893
Forgiveness of Paycheck Protection Program loan (387) 0
Gain on sale of property and equipment (66) (86)
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets (291) (682)
Other assets (24) 6,060
Accounts payable (386) 116
Operating lease liabilities (66) (5,033)
Accrued expenses and other current liabilities 1,009 (1,741)
Net cash used in operating activities (23,754) (20,476)
Cash flows from investing activities:    
Purchases of investments (73,577) (10,034)
Proceeds from sales or maturities of investments 37,751 16,242
Purchases of property and equipment (157) (5)
Proceeds from sale of fixed asset 66 208
Net cash (used in) provided by investing activities (35,917) 6,411
Cash flows from financing activities:    
Proceeds from issuance of common stock, common warrants and pre-funded warrants, net of issuance costs 55,583 15,413
Proceeds from Paycheck Protection Program Loan   387
Proceeds from exercise of stock options 74  
Net cash provided by financing activities 55,657 15,800
Net Increase (decrease) in cash, cash equivalents and restricted cash (4,014) 1,735
Cash, cash equivalents and restricted cash at beginning of period 7,639 5,904
Cash, cash equivalents and restricted cash at end of period 3,625 7,639
Cash and cash equivalents, end of year 3,600 7,046
Restricted cash, end of year $ 25 593
Supplemental disclosure of non-cash financing activities:    
Common stock issuance costs included in accounts payable and accrued expenses   $ 127