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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating activities:    
Net loss $ (22,931) $ (33,584)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 3,061 3,532
Non-cash operating lease expense 1,158 981
Depreciation and amortization 112 143
Amortization of costs to obtain a contract with a customer 77 0
Amortization of finance lease right-of-use asset 6 0
Non-cash interest expense 5 1
Changes in assets and liabilities:    
Accounts receivable (10,413) (477)
Inventory (6,097) 0
Prepaid expenses, other current assets, and other assets 3,735 (2,440)
Accounts payable and accrued liabilities 8,886 (2,371)
Accrued indirect tax liabilities 6,506 3,945
Accrued compensation and benefits 235 203
Contract liabilities (5,799) 2,646
Operating lease liabilities (973) (1,052)
Net cash used in operating activities (22,432) (28,473)
Investing activities:    
Purchases of property and equipment (505) (118)
Net cash used in investing activities (505) (118)
Financing activities:    
Proceeds from underwritten public offering, net of issuance costs 17,256 0
Proceeds from public offering of common stock, net of issuance costs 8,707 2,362
Proceeds from exercise of stock options 21 0
Issuance costs for underwritten public offering 0 (720)
Principal repayments of Term Loan 0 (2,593)
Net cash provided by (used in) financing activities 25,984 (951)
Net increase (decrease) in cash and cash equivalents 3,047 (29,542)
Cash and cash equivalents at beginning of year 32,731 62,273
Cash and cash equivalents at end of year 35,778 32,731
Supplemental disclosure of cash flows:    
Interest paid 0 40
Income taxes paid 797 0
Non-cash investing activity:    
Purchases of property and equipment, included in accounts payable and accrued liabilities 11 69
Finance lease right-of-use asset obtained in exchange for lease liability 788 0
Operating lease right-of-use asset obtained in exchange for lease liability 3,847 0
Non-cash financing activities:    
Purchase of shares pursuant to Employee Stock Purchase Plan 122 140
Proceeds from public offering of common stock, net of issuance costs, included in prepaid expenses, other current assets, and other assets $ 0 $ 8