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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Operating activities:    
Net loss $ (2,266) $ (7,283)
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation 67 62
Stock-based compensation 1,924 1,972
Net unrealized loss on foreign currency transactions 159 270
Amortization of term loan discount and issuance costs   180
Amortization of investments, net (519) (597)
Deferred revenue (7,298) (4,882)
Changes in operating assets and liabilities:    
Accounts receivable (2,159) (905)
Prepaid expenses and other current assets 2,008 (2,421)
Accounts payable (203) (930)
Accrued expenses 228 332
Right-of-use assets and lease liabilities, net (11) (8)
Net cash used in operating activities (8,070) (14,210)
Investing activities:    
Purchases of property and equipment (81)  
Purchases of short-term investments (17,601) (37,181)
Maturities of short-term investments 13,500 27,000
Net cash used in investing activities (4,182) (10,181)
Financing activities:    
Repayment of notes payable   (9,133)
Net cash provided by (used in) financing activities 91 (9,047)
Effect of exchange rate changes on cash and cash equivalents 2 (45)
Net decrease in cash and cash equivalents (12,159) (33,483)
Cash and cash equivalents at beginning of period 23,216 59,107
Cash and cash equivalents at end of period 11,057 25,624
Follow-on Offering    
Financing activities:    
Proceeds from issuance of common stock under employee stock purchase plan $ 91 $ 86