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Income Taxes - Reconciliation to Statutory Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes      
Income tax expense (benefit) at U.S. statutory rates $ 10,706 $ 5,393 $ (1,777)
State taxes, net of U.S. federal impact 1,101 (607) (121)
Effect of international operations (11,149) 609 (131)
Research and development tax credit (6,470) (3,964) 726
Net change in valuation allowance (104,972) (2,389) 388
Change in accrual for unrecognized tax benefits 3,349 398 (6)
Share-based compensation 606 1,208 2,248
Asset impairment     728
Partial extinguishment of 2023 Notes   (1,090) (2,292)
Adoption of new accounting standard (9,295)    
Other 167 84 164
Total expense (benefit) for income taxes $ (115,957) $ (358) $ (73)