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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Cash flows from operating activities    
Net loss $ (37,490) $ (33,029)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization expense 166 93
Non-cash interest expense 38 40
Non-cash lease expense 334 134
Stock-based compensation expense 5,378 2,928
Gain on forgiveness of Paycheck Protection Program note 0 (426)
Impairment on note receivable 0 758
Changes in assets and liabilities:    
Prepaid expenses and other assets 132 965
Accounts payable and accrued expenses 2,844 1,483
Lease obligations (265) (130)
Other assets 0 100
Net cash used in operating activities (28,863) (27,084)
Cash flows from investing activities    
Purchase of property and equipment (1,589) (524)
Issuance of note receivable 0 (750)
Net cash used in investing activities (1,589) (1,274)
Cash flows from financing activities    
Proceeds from issuance of common stock 50,586 128,496
Tax payments for net share settlement of restricted stock units (48) 0
Payment of equity issuance costs (200) (8,525)
Financing lease principal payments 0 (10)
Net cash provided by financing activities 50,338 119,961
Effect of changes in exchange rate on cash, cash equivalents, and restricted cash 10 0
Net increase in cash, cash equivalents, and restricted cash 19,896 91,603
Cash, cash equivalents, and restricted cash at beginning of period 95,109 24,190
Cash, cash equivalents, and restricted cash at end of period 115,005 115,793
Supplemental disclosure of non-cash investing and financing transactions:    
Series B Convertible Preferred Stock issuance 0 4,988
Exercise of warrants 0 603
Forgiveness of Paycheck Protection Program note 0 426
Equity issuance costs 69 0
Purchase of property and equipment 491 78
Right-of-use asset related to operating leases $ 2,918 $ 926