Leases - Additional Information (Detail) - Office Space [Member] - ft²			1 Months Ended	12 Months Ended
	May 04, 2020	Dec. 16, 2019	Aug. 31, 2015	Dec. 31, 2023
Lessee Lease Description [Line Items]
Operating lease, existence of option to extend			true
Lease Agreements [Member] | Cambridge, Massachusetts [Member] | U.S. REIF Central Plaza Massachusetts, LLC [Member]
Lessee Lease Description [Line Items]
Operating lease expiration date				2027-07
Operating lease, existence of option to extend	true	true
Area of office space				23,400