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v3.22.2

Condensed Statements of Cash Flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Cash flows from operating activities |  |
Net loss | $ (26,765) | $ (21,193)
Adjustments to reconcile net loss to net cash used in operations: |  |
Depreciation and amortization | 901 | 665
Impairment of property and equipment | 60 | 664
Share-based compensation expense | 7,854 | 9,535
Non-cash interest expense | 9 | 7
Inventory write-downs | 17 |
Net accretion of premium on short-term investments | 269 |
Change in: |  |
Inventory | (70) | (151)
Other current and non-current assets | 1,213 | (193)
Accounts payable | (1,874) | 803
Accrued liabilities | 246 | 146
Contract liabilities and other current liabilities | (1,845) | (1,225)
Operating lease liabilities | (619) | (335)
Net cash used in operating activities | (20,604) | (11,277)
Cash flows from investing activities |  |
Sales of investment securities | 14,500 |
Purchases of investment securities | (38,134) |
Purchases of property and equipment | (1,128) | (1,884)
Net cash used in investing activities | (24,762) | (1,884)
Cash flows from financing activities |  |
Principal payments under finance leases | (15) | (18)
Principal payments under long-term debt | (392) |
Payments received on subscriptions receivable |  | 6,135
Proceeds from stock option exercises | 416 | 2,510
Net proceeds from issuance of common stock |  | 122,960
Net cash provided by financing activities | 9 | 131,587
Change in cash, cash equivalents, and restricted cash | (45,357) | 118,426
Cash, cash equivalents, and restricted cash at beginning of period | 83,739 | 17,297
Cash, cash equivalents, and restricted cash at end of period | 38,382 | 135,723
Supplemental schedule of non-cash investing and financing activities |  |
Non-cash additions to property and equipment | $ 255 | $ 164

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