Related Party Transactions - Schedule of Related Party Transactions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Research and development	$ 92,321	$ 43,978
Sales and marketing	18,270	8,385
General and administrative	50,722	35,966
Assets
Prepaid expenses and other current assets	23,081	12,539
Operating lease right-of-use assets	4,613	3,753
Other noncurrent assets	5,155	4,910
Liabilities
Accounts payable	5,599	3,055
Current operating lease liabilities	710	591
Unearned revenue	12,087	8,729
Non-current operating lease liabilities	7,395	3,459
UMD and Duke [Member]
Related Party Transaction [Line Items]
Revenues	4,585	4,022
Cost of revenue	132	51
Research and development	1,035	1,082
Sales and marketing	57	131
General and administrative	116	117
Assets
Prepaid expenses and other current assets	531	529
Operating lease right-of-use assets	3,452	3,753
Other noncurrent assets	805	1,325
Liabilities
Accounts payable	6	29
Accrued expenses	124	0
Current operating lease liabilities	661	591
Unearned revenue	2,670	3,514
Non-current operating lease liabilities	$ 3,181	$ 3,459