Share-Based Compensation - Summary of Pre-tax Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total pre-tax share-based compensation expense	$ 1,386	$ 100	$ 3,677	$ 155
Direct Costs and Expenses
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total pre-tax share-based compensation expense	18		37
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total pre-tax share-based compensation expense	141	10	465	20
Sales, Marketing, General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total pre-tax share-based compensation expense	$ 1,227	$ 90	$ 3,175	$ 135