Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows used in operating activities:    
Net loss $ (26,206) $ (37,630)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation and amortization 623 687
Amortization of right-of-use assets 94 151
Net amortization of premiums and discounts on short-term investments (2,611) 140
Share-based compensation expense 9,467 7,023
Other, net 217 1,374
Net changes in operating assets and liabilities    
Accounts receivable, net (5,559) (4,986)
Inventories, net (6,993) (6,940)
Prepaid expenses and other current assets 3,588 307
Non-current assets (17) 0
Accounts payable, accrued and other liabilities (4,117) (6,704)
Lease liabilities (156) (168)
Net cash used in operating activities (31,670) (46,746)
Cash flows used in investing activities:    
Purchase of investments (142,397) (163,504)
Proceeds from investments 167,766 110,566
Purchase of long-lived assets (347) (79)
Capitalized patent costs (162) 0
Net cash provided by (used in) investing activities 24,860 (53,017)
Cash flows from financing activities    
Proceeds from exercise of stock options 1,639 405
Cash provided by financing activities 1,639 405
Net decrease in cash, cash equivalents and restricted cash (5,171) (99,358)
Cash, cash equivalents and restricted cash, beginning of period 94,172 231,900
Cash, cash equivalents and restricted cash, end of period 89,001 132,542
Supplemental cash flow information    
Cash received for interest 1,595 13
Cash paid for income taxes (1) 0
Cash paid for amounts included in the measurement of lease liabilities (263) (281)
Initial recognition of operating lease right-of-use asset 0 0
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets    
Cash, cash equivalents 88,327 131,636
Restricted cash 674 906
Total cash, cash equivalents and restricted cash $ 89,001 $ 132,542