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v3.22.2.2

Condensed Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
Cash flows from operating activities |  |
Net loss | $ (39,616) | $ (30,575)
Adjustments to reconcile net loss to net cash used in operations: |  |
Depreciation and amortization | 1,425 | 1,040
Impairment of property and equipment | 60 | 664
Share-based compensation expense | 11,935 | 12,345
Non-cash interest expense |  | (10)
Inventory write-downs | 60 |
Net accretion of premium on short-term investments | 290 |
Gain on extinguishment of debt |  | (692)
Change in: |  |
Inventory | (42) | (1,182)
Other current and non-current assets | (662) | (3,038)
Accounts payable | (2,160) | 573
Accrued liabilities | 418 | 390
Contract liabilities and other current liabilities | (386) | (59)
Operating lease liabilities | (938) | (506)
Other long-term liabilities |  | (195)
Net cash used in operating activities | (29,616) | (21,245)
Cash flows from investing activities |  |
Sales of investment securities | 34,700 |
Purchases of investment securities | (63,726) |
Purchases of property and equipment | (2,017) | (2,034)
Net cash used in investing activities | (31,043) | (2,034)
Cash flows from financing activities |  |
Principal payments under finance leases | (20) | (25)
Principal payments under long-term debt | (392) |
Payments received on subscriptions receivable |  | 6,135
Proceeds from stock option exercises | 727 | 2,540
Net proceeds from issuance of common stock |  | 122,902
Net cash provided by financing activities | 315 | 131,552
Change in cash, cash equivalents, and restricted cash | (60,344) | 108,273
Cash, cash equivalents, and restricted cash at beginning of period | 83,739 | 17,297
Cash, cash equivalents, and restricted cash at end of period | 23,395 | 125,570
Supplemental schedule of non-cash investing and financing activities |  |
Non-cash additions to property and equipment | $ 645 | $ 298

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