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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net loss $ (49,496) $ (46,600)
Adjustments to reconcile net loss to net cash used in operating activities:    
Impairment of acquired contract intangible asset 0 3,724
Share-based compensation expense 8,843 6,773
Amortization of premiums and discounts on short-term investments, net (2,650) (149)
Non-cash interest expense 58 0
Non-cash lease expense 346 270
Depreciation and amortization expense 125 113
Changes in operating assets and liabilities:    
Accounts receivable (3,855) (2,261)
Inventory (1,040) (734)
Prepaid expenses and other current assets 2,574 (1,578)
Other non-current assets 398 365
Operating lease liabilities (375) (170)
Accounts payable and accrued liabilities (4,947) 1,917
Net cash used in operating activities (50,019) (38,330)
Cash flows from investing activities:    
Purchases of property and equipment (3,156) (366)
Purchase of short-term investments (50,542) (48,141)
Maturity of short-term investments 133,255 0
Net cash provided by (used in) investing activities 79,557 (48,507)
Cash flows from financing activities:    
Proceeds from sale of common stock and prefunded warrants 0 72,500
Issuance of common stock upon exercise of stock options 78 396
Proceeds from issuance of common stock under employee stock purchase plan 294 0
Issuance of common stock upon exercise of warrants 0 54
Deferred offering costs paid for financing (126) (223)
Net cash provided by financing activities 246 72,727
Net increase (decrease) in cash, cash equivalents and restricted cash 29,784 (14,110)
Cash, cash equivalents and restricted cash, beginning of year 39,083 148,989
Cash, cash equivalents and restricted cash, end of period 68,867 134,879
Supplemental disclosure of cash flow information:    
Interest paid during the period 173 173
Taxes paid during the period 0 9
Supplemental disclosure of non-cash activities:    
Costs incurred in connection with Private Placement included in accounts payable 0 322
Deferred transaction costs included in accounts payable and accrued liabilities 9 75
Accrued property and equipment 122 60
Operating lease liability arising from obtaining right-of-use asset $ 0 $ 1,210