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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023
Cash flows from operating activities |  |
Net loss | $ (28,595) | $ (31,821)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 378 | 295
Accretion of debt discount and amortization of debt issuance costs | 168 | 294
Stock-based compensation expense | 8,823 | 7,265
Provision for credit losses | 104 | 40
Provision for excess and obsolete inventories | (91) | 208
Noncash operating lease expense | 325 | 489
Loss on disposal of property and equipment | 0 | 66
Noncash loss on extinguishment of debt | 1,033 | 0
Changes in operating assets and liabilities: |  |
Accounts receivable | (5,734) | (2,995)
Inventory | 1,159 | (2,001)
Prepaid expenses and other current assets | 1,151 | 1,622
Other noncurrent assets | (49) | (156)
Accounts payable | 627 | 190
Accrued compensation | 866 | (1,632)
Accrued and other current liabilities | 1,909 | (2,894)
Other noncurrent liabilities | (1,328) | 158
Net cash used in operating activities | (19,254) | (30,872)
Cash flows from investing activities |  |
Purchases of property and equipment | (197) | (223)
Net cash used in investing activities | (197) | (223)
Cash flows from financing activities |  |
Net proceeds from Hercules Loan Agreement | 34,526 | 0
Repayment of MidCap Loan Agreement | (35,375) | 0
Debt issuance costs | (238) | 0
Proceeds from employee stock purchase plan purchases | 450 | 661
Taxes paid on net share settlement of restricted stock units | (20) | (222)
Proceeds from exercise of common stock options | 156 | 171
Net cash (used in) provided by financing activities | (501) | 610
Net change in cash and cash equivalents | (19,952) | (30,485)
Cash and cash equivalents at beginning of period | 138,129 | 185,000
Cash and cash equivalents at end of period | 118,177 | 154,515
Supplemental disclosure of cash flow information |  |
Cash paid for interest | 2,024 | 2,066
Supplemental noncash disclosure of investing and financing activities |  |
Acquisition of property and equipment included in accounts payable and accrued liabilities | 0 | 147
Common stock warrants issued upon execution of Hercules Loan Agreement | $ 609 | $ 0

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