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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Schedule of Restricted Cash Restricted Cash
(in thousands)
As of December 31, 2022As of December 31, 2021
Letter of credit security: Waltham lease
$250 $250 
Letter of credit security: Vienna Austria lease
205 216 
Letter of credit security: Boston lease855 855 
Total restricted cash$1,310 $1,321 
Restricted cash included in prepaid expenses and other current assets$285 $— 
Restricted cash included in other assets$1,025 $1,321 
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash to Cash Flows The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets to the sum to the total of amounts shown in the Company’s consolidated statements of cash flows as of December 31, 2022, 2021 and 2020:
(in thousands)December 31,
2022		December 31, 2021December 31,
2020
Cash and cash equivalents$121,718 $81,787 $78,708 
Restricted cash, current (included within prepaid expenses and other current assets)285 — 264 
Restricted cash, non-current (included within other assets)1,025 1,321 1,730 
Total cash, cash equivalents and restricted cash$123,028 $83,108 $80,702 
Property and Equipment Useful Life Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization expense is recognized using the straight-line method over the estimated useful life of each asset, as follows:
Estimated Useful Life
Office furniture
3 to 7 years
Computer equipment3 years
Laboratory equipment
3 to 10 years
Leasehold improvements
Shorter of lease term or 10 years