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Consolidated Statements of Cash Flows $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Operating activities: |  |  |
Net Loss | $ (65,276) | $ (76,240) | $ (33,592)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 4,946 | 5,518 | 5,402
Reduction in the carrying amount of right-of-use assets | 3,184 | 4,405 | 4,849
Stock-based compensation | 13,087 | 9,971 | 14,531
Provision (recovery) for credit losses | 97 | (65) | 4
Asset impairment and other charges | 165 | 9,984 | 0
Impairment of investment in non-marketable securities | 6,902 | 12,215 | 0
Equity securities earned from research and development activities ($0, $0, and ($1,245) from a related party) | 0 | (213) | (1,245)
Unrealized gain on non-marketable securities ($0, $0, and ($208) from a related party) | 0 | 0 | (208)
Non-cash interest expense | 885 | 0 | 0
Amortization of discount on short-term investments | (1,380) | 0 | 0
Other non-cash items | (4) | 4 | (29)
Changes in operating assets and liabilities: |  |  |
Financial assets | 1,252 | 20,247 | (3,225)
Inventories | 886 | (656) | (869)
Prepaid expenses and other assets | 893 | (865) | 181
Accounts payable | (2,567) | 2,287 | 207
Accrued compensation and other accrued liabilities | 1,982 | (14,041) | 5,983
Other long-term liabilities | (4,151) | (5,341) | (5,223)
Deferred revenue | (10,311) | (19,848) | 24,518
Net cash provided by (used in) operating activities | (49,410) | (52,638) | 11,284
Investing activities: |  |  |
Purchase of property and equipment | (4,305) | (4,418) | (8,307)
Proceeds from sale of property and equipment | 87 | 751 | 29
Purchases of short-term investments | (90,235) | 0 | 0
Proceeds from maturity of short-term investments | 35,500 | 0 | 0
Proceeds from sale of short-term investments | 1,973 | 0 | 0
Investment in non-marketable securities | 0 | (1,191) | (5,300)
Net cash used in investing activities | (56,980) | (4,858) | (13,578)
Financing activities: |  |  |
Proceeds from exercises of stock options | 1,384 | 422 | 955
Proceeds from issuance of stock under employee stock purchase plan | 646 | 0 | 0
Proceeds from issuance of common stock in connection with equity sales agreements | 31,319 | 8,652 | 0
Costs incurred in connection with equity sales agreements | (1,706) | (503) | (42)
Proceeds from long-term debt | 29,521 | 0 | 0
Payment of debt issuance costs | (642) | 0 | 0
Taxes paid related to net share settlement of equity awards | 0 | (404) | (1,488)
Net cash provided by (used in) financing activities | 60,522 | 8,167 | (575)
Net decrease in cash, cash equivalents and restricted cash | (45,868) | (49,329) | (2,869)
Cash, cash equivalents and restricted cash at the beginning of the year | 66,697 | 116,026 | 118,895
Cash, cash equivalents and restricted cash at the end of the year | 20,829 | 66,697 | 116,026
Supplemental disclosure of cash flow information: |  |  |
Interest paid | 2,566 | 44 | 34
Income taxes | 17 | 194 | 100
Supplemental non-cash investing and financing activities: |  |  |
Capital expenditures incurred but not yet paid | 566 | 1,068 | 897
Cash reconciliation: |  |  |
Cash and cash equivalents | 19,264 | 65,116 | 113,984
Restricted cash, current and non-current | 1,565 | 1,581 | 2,042
Total cash, cash equivalents and restricted cash at the end of the period | $ 20,829 | $ 66,697 | $ 116,026

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