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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Revenues:        
Total revenues $ 80,630 $ 69,514 $ 205,214 $ 176,688
Operating expenses:        
Cost of sales - product 13,084 13,229 36,035 41,478
Research and development 14,403 14,116 42,881 40,767
Selling, general and administrative 43,061 38,053 128,788 111,667
Gain on sale of assets (Note 5) 0 (1,000) 0 (1,000)
Bad debt expense 0 0 0 12,313
Total operating expenses 70,548 64,398 207,704 205,225
Income (loss) from operations 10,082 5,116 (2,490) (28,537)
Other income (expense):        
Interest income 9,382 8,462 28,050 22,437
Interest expense (1,699) (1,691) (5,090) (5,065)
Sublease income (Note 5) 2,205 1,993 2,808 5,584
Other (152) 266 (52) 218
Net income (loss) before income taxes 19,818 14,146 23,226 (5,363)
(Provision for) benefit from income taxes (2,224) 147 (2,967) (1,245)
Net income (loss) $ 17,594 $ 14,293 $ 20,259 $ (6,608)
Net income (loss) per share attributable to common stockholders        
Basic (in USD per share) $ 0.13 $ 0.11 $ 0.15 $ (0.05)
Diluted (in USD per share) $ 0.12 $ 0.10 $ 0.15 $ (0.05)
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders:        
Basic (in USD per share) 131,133 128,988 130,746 128,515
Diluted (in USD per share) 154,807 154,196 133,644 128,515
Product revenue, net        
Revenues:        
Total revenues $ 79,345 $ 62,318 $ 197,377 $ 162,209
Other revenue        
Revenues:        
Total revenues $ 1,285 $ 7,196 $ 7,837 $ 14,479