Share-Based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	$ 2,303	$ 2,368
Research and Development, net
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	674	546
Clinical Operations
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	120	122
Sales and Marketing
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	391	777
General and Administrative
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation expense	$ 1,118	$ 923