Summary of Significant Accounting Policies - Schedule of Compensating Balance Arrangements (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Line Items]
Total restricted cash	$ 778	$ 1,025
Restricted Cash	1,028	1,310
Restricted cash, current portion	250	285
Letter of Credit | Waltham Lease
Cash and Cash Equivalents [Line Items]
Restricted Cash	250	250
Letter of Credit | Vienna Austria Lease
Cash and Cash Equivalents [Line Items]
Restricted Cash	207	205
Letter of Credit | Allston Lease Agreement
Cash and Cash Equivalents [Line Items]
Restricted Cash	$ 571	$ 855