v3.26.1
Condensed Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash flows from operating activities    
Net loss $ (12,889) $ (15,240)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 4,581 5,854
Depreciation 126 104
Amortization of debt discount and issuance costs 138 104
Non-cash interest expense 157 390
Loss on debt extinguishment 0 527
Amortization of right-of-use asset 917 835
Unrealized loss on short-term investments 206 41
Inventory write-downs 144 93
Loss on disposal of property and equipment 0 2
Changes in operating assets and liabilities:    
Accounts receivable (249) (704)
Inventory (1,360) (3,058)
Prepaid expenses and other assets (14) 671
Accounts payable 1,983 1,703
Accrued liabilities (2,489) (120)
Deferred revenue (18) 141
Operating lease liabilities (1,036) (911)
Net cash used in operating activities (9,803) (9,568)
Cash flows from investing activities    
Acquisition of property and equipment (242) (205)
Net cash used in investing activities (242) (205)
Cash flows from financing activities    
Repurchase of common stock from KCK Ltd. 0 (49,546)
Proceeds from issuance of common stock under employee plans 1,387 1,151
Taxes withheld and paid related to net share settlement of equity awards (227) (402)
Payment of annual debt fee (150) 0
Net cash provided by financing activities 1,010 19,200
Net increase (decrease) in cash and cash equivalents (9,035) 9,427
Cash, cash equivalents and restricted cash at the Beginning of the Period 21,814 13,552
Cash, cash equivalents and restricted cash at the End of the Period 12,779 22,979
Reconciliation of cash, cash equivalents and restricted cash to balance sheets:    
Cash and cash equivalents 12,538 22,857
Restricted cash 241 122
Cash, cash equivalents and restricted cash in balance sheets 12,779 22,979
Supplemental disclosure of cash flow information:    
Cash paid for interest 2,792 3,276
Supplemental disclosures of non-cash investing and financing information:    
Follow-on offering costs included in accounts payable and accrued liabilities 0 50
Debt issuance costs included in accounts payable and accrued liabilities 0 82
Deferred offering costs offset against additional paid-in capital 0 277
Purchase of property and equipment included in accounts payable 17 25
Follow-on Offering    
Cash flows from financing activities    
Proceeds from issuance of common stock in follow-on offering, net of underwriting discounts and commissions 0 69,704
At-the-Market Equity Offering    
Cash flows from financing activities    
Proceeds from At-the-Market offering, net of sales commission 0 232
Proceeds from debt, net of discounts and issuance costs 0 58,568
Repayment of debt $ 0 $ (60,507)