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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 | $ (71,317) | $ (56,693)
Adjustments to reconcile net loss to net cash used in operating activities |  |
Stock-based compensation expense | 13,799 | 4,984
Vesting of common stock warrant in return for services | 87 | 48
Change in fair value of derivative liability | 92 | 21
Depreciation and amortization | 1,523 | 1,443
Amortization of right-of-use assets | 1,497 | 0
Net amortization (accretion) of premium (discount) on marketable securities | 719 | 0
Changes in operating assets and liabilities |  |
Accounts receivable | 1,439 | (508)
Prepaid expenses and other current assets | (4,225) | (2,566)
Other assets | 0 | 75
Accounts payable | 2,285 | 43
Accrued and other liabilities | 689 | 1,899
Deferred revenue | (14,722) | 345
Operating lease liabilities | (1,000) | 0
Net cash used in operating activities | (69,134) | (50,909)
Cash flows from investing activities |  |
Acquisition of property and equipment | (9,110) | (1,000)
Purchase of marketable securities | (168,570) | 0
Maturities of marketable securities | 5,000 | 0
Net cash used in investing activities | (172,680) | (1,000)
Cash flows from financing activities |  |
Issuance of redeemable convertible preferred stock, net of issuance costs | 0 | 72,468
Issuance of common stock upon offerings, net of issuance costs | 114,296 | 205,658
Issuance of common stock upon exercise of stock options and warrants | 3,360 | 857
Issuance of common stock through 2020 ESPP | 433 | 0
Net cash provided by financing activities | 118,089 | 278,983
Net (decrease) increase in cash and cash equivalents | (123,725) | 227,074
Cash and cash equivalents, beginning of period | 276,726 | 49,652
Cash and cash equivalents, end of period | 153,001 | 276,726
Supplemental disclosures of noncash investing and financing information |  |
Conversion of redeemable convertible preferred stock into common stock | 0 | 175,448
Purchases of property and equipment in accounts payable and accrued and other liabilities | 2,199 | 466
Unpaid offering costs | 152 | 946
Decrease in right-of-use assets due to reduction in operating lease liabilities upon modification | (478) | 0
Issuance of common stock warrant to settle liability | 1,146 | 0
Receivable for common stock issued upon exercise of stock options | $ 545 | $ 0

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