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CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash flows used in operating activities:    
Net income (loss) $ 8,588 $ (25,060)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,143 1,953
Share-based compensation 2,906 4,092
Loss on disposal of assets 65 7
Non-cash interest expense 227 213
Amortization of right-of-use assets 284 325
Gain on changes in fair value 348 769
(Gain) loss from equity method investment (1,713) 1,341
Amortization of discount on note receivable (114) (94)
Gain on change in fair value of warrant liability (10,386)  
Changes in operating assets and liabilities:    
Prepaid expenses (3,277) (872)
Accounts receivable 511 26
Contract asset (1,359)  
Other assets and other current assets (57) (571)
Accounts payable (2,102) (559)
Other liabilities and other current liabilities (5,837) (4,516)
Deferred revenue (7,945) (8,032)
Lease liabilities (263) (486)
Net cash used in operating activities (18,981) (31,464)
Cash flows used in investing activities:    
Purchases of property, equipment and software (86) (521)
Purchases of intangible assets   (200)
Proceeds from sale of equipment 60  
Net cash used in investing activities (26) (721)
Cash flows provided by financing activities:    
Proceeds from stock option exercises   30
Proceeds from employee stock purchase plan 112 266
Proceeds from offering of common stock and warrants, net of issuance costs 39,078 445
Proceeds from issuance of common stock to collaboration partners and licensees 905  
Net cash provided by financing activities 40,095 741
Net increase (decrease) in cash and cash equivalents 21,088 (31,444)
Cash and cash equivalents—beginning of period 116,678 189,576
Cash and cash equivalents —end of period 137,766 158,132
Supplemental disclosures of cash flow information:    
Property, equipment and software additions included in accounts payable and other current liabilities 6 43
Cash paid for interest $ 526 $ 464