Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) Customers FinancialInstitution $ / shares shares	Jun. 30, 2023 USD ($) Customers	Jun. 30, 2024 USD ($) Customers FinancialInstitution $ / shares shares	Jun. 30, 2023 USD ($) Customers	Dec. 31, 2023 USD ($)	Sep. 30, 2021 shares
Significant Accounting Policies [Line Items]
Revenue, remaining performance obligation, amount	$ 59,500,000		$ 59,500,000
Allowance for doubtful accounts	0		0		$ 0
Impairment of Long-Lived Assets to be Disposed of	0	$ 0	0	$ 0
Accrued interest receivable on available-for-sale investments	1,700,000		1,700,000		2,100,000
Capitalized materials and supplies	$ 2,600,000	1,400,000	$ 3,600,000	2,200,000
Warrant issue price | $ / shares	$ 11.5		$ 11.5
Letters of credit outstanding amount	$ 2,100,000		$ 2,100,000		2,100,000
Percentage Of Remaining Performance Obligation	45.00%		45.00%
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Explanation			twelve months
Number of financial institutions | FinancialInstitution	3		3
Research and development expense	$ 31,204,000	19,869,000	$ 63,572,000	36,102,000
Excess and Obsolescence [Member]
Significant Accounting Policies [Line Items]
Excess and obsolescence charges	100,000	0	100,000	0
Capitalized Commissions [Member]
Significant Accounting Policies [Line Items]
Capitalized contract cost	1,900,000		1,900,000		$ 2,800,000
Capitalized contract cost amortization expense	$ 500,000	$ 200,000	$ 900,000	$ 300,000
Revenue Benchmark [Member]
Significant Accounting Policies [Line Items]
Number of customers over ten percent benchmark | Customers	2	3	2	3
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Two Customer [Member]
Significant Accounting Policies [Line Items]
Concentration risk, percentage	79.00%		75.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Three Customer [Member]
Significant Accounting Policies [Line Items]
Concentration risk, percentage		70.00%		71.00%
Software and Software Development Costs [Member]
Significant Accounting Policies [Line Items]
Finite lived intangible asset, useful life	3 years		3 years
Software and Software Development Costs [Member] | Internal-Use Software [Member]
Significant Accounting Policies [Line Items]
Amortization of intangible assets	$ 1,300,000	$ 600,000	$ 2,400,000	$ 1,100,000
Intangible asset capitalized during period	1,200,000	2,000,000	3,800,000	3,300,000
Software and Software Development Costs [Member] | External-Use Software [Member]
Significant Accounting Policies [Line Items]
Intangible asset capitalized during period	$ 0	0	$ 0	0
Public Warrants [Member]
Significant Accounting Policies [Line Items]
Number of warrants or rights outstanding | shares	5,228,253		5,228,253			7,500,000
Class of warrant redeemed | shares	0		0
Option Agreement [Member] | Duke [Member]
Significant Accounting Policies [Line Items]
Research and development expense	$ 100,000	$ 100,000	$ 300,000	$ 300,000