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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash flows used in operating activities:    
Net loss $ (10,749) $ (26,206)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation and amortization 4,847 717
Net amortization of premiums and discounts on short-term investments (3,206) (2,611)
Share-based compensation expense 5,737 9,467
Foreign exchange on finance lease liability (6,025) 0
Other, net 1,559 217
Net changes in operating assets and liabilities    
Accounts receivable, net (4,820) (5,559)
Inventories, net (56) (6,993)
Prepaid expenses and other current assets 873 3,588
Non-current operating assets 17 (17)
Accounts payable, accrued and other liabilities (6,594) (4,117)
Operating lease liabilities (181) (156)
Net cash used in operating activities (18,598) (31,670)
Cash flows used in investing activities:    
Purchase of investments (121,260) (142,397)
Proceeds from investments 170,505 167,766
Purchase of property and equipment 0 (347)
Capitalized patent costs (12) (162)
Net cash provided by investing activities 49,233 24,860
Cash flows from financing activities    
Repurchase of common shares, net of transaction costs (12,301) 0
Finance lease payments (2,778) 0
Proceeds from exercise of stock options 28 1,639
Cash (used in) provided by financing activities (15,051) 1,639
Net increase (decrease) in cash, cash equivalents and restricted cash 15,584 (5,171)
Cash, cash equivalents and restricted cash, beginning of period 48,875 94,172
Cash, cash equivalents and restricted cash, end of period 64,459 89,001
Supplemental cash flow information    
Cash received for interest 861 1,595
Cash paid for income taxes 0 (1)
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets    
Cash, cash equivalents 63,914 88,327
Restricted cash 545 674
Total cash, cash equivalents and restricted cash $ 64,459 $ 89,001