Related Party Transactions - Schedule of Related Party Transactions (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Prepaid expenses and other current assets	$ 25,022	$ 23,081
Operating lease right-of-use assets	9,261	4,613
Other noncurrent assets	5,612	5,155
Liabilities
Current portion of operating lease liabilities	1,178	710
Unearned revenue	16,742	12,087
Operating lease liabilities, net of current portion	14,452	7,395
Duke [Member]
Assets
Prepaid expenses and other current assets	520	520
Other noncurrent assets	675	805
UMD [Member]
Assets
Operating lease right-of-use assets	3,373	3,452
Liabilities
Current portion of operating lease liabilities	666	661
Unearned revenue	1,447	2,670
Operating lease liabilities, net of current portion	$ 3,101	$ 3,181