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Condensed Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Cash flows from operating activities |  |
Net loss | $ (13,614) | $ (18,702)
Adjustments to reconcile net loss to net cash, cash equivalents, and restricted cash used in operating activities |  |
Depreciation and amortization | 1,420 | 785
(Accretion) amortization of lease right-of-use assets | (98) | 760
Share-based compensation expense | 2,640 | 2,281
Change in fair value of warrant liability, net |  | (61)
Provision for doubtful accounts | 129 | 198
Accrued interest, amortization of debt issuance costs and other | 1,064 | 1,357
Inventory excess and obsolescence | 8 | 30
Impairment loss on intangible assets | 68 | 20
Changes in operating assets and liabilities: |  |
Accounts receivable | (2,344) | (33)
Other current assets | (425) | 544
Other long-term assets | (22) | (10)
Accounts payable and other accrued liabilities | (1,234) | (2,031)
Deferred revenue | (37) | 129
Contingent consideration | (3,409) |
Tenant improvement allowances received |  | 7,248
Current and long-term operating lease liabilities | 543 | (201)
Net cash and cash equivalents and restricted cash used in operating activities | (15,311) | (7,686)
Cash flows from investing activities |  |
Purchase of property and equipment | (234) | (7,676)
Patent costs and intangible asset acquisition, net | (39) | (30)
Net cash and cash equivalents and restricted cash used in investing activities | (273) | (7,706)
Cash flows from financing activities |  |
Proceeds from the issuance of common stock | 625 |
Proceeds from issuance of common stock under employee stock purchase plan | 282 | 420
Proceeds from exercise of stock options | 3 | 6
Payment of contingent consideration |  | (2,000)
Repayment of term loan and notes payable | (13) | (12)
Payment of debt issuance costs | (18) | (801)
Equity financing costs | (18) |
Other | (70) | (34)
Net cash and cash equivalents and restricted cash provided by (used in) financing activities | 791 | (2,421)
Net decrease in cash and cash equivalents and restricted cash | (14,793) | (17,813)
Cash, cash equivalents, and restricted cash ‑ beginning of period | 26,371 | 43,174
Cash, cash equivalents, and restricted cash ‑ end of period | 11,578 | 25,361
Supplemental cash flow information: |  |
Debt issuance costs included in accounts payable and other accrued liabilities | 13 |
Equity financing costs included in accounts payable and other accrued liabilities | 305 | 61
Operating lease right-of-use asset obtained in exchange for lease liabilities | 338 | 43
Finance lease right-of-use assets obtained in exchange for lease liabilities |  | 329
Cash paid for interest | 1,475 | $ 1,032
Purchases of property & equipment included in accounts payable and accrued liabilities | $ 1,405 |

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