Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023	Jun. 30, 2024 USD ($) Use	Jun. 30, 2023	Dec. 31, 2023 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Gain (loss) on foreign currency transactions	$ (7,000)		$ (12,000)
Cash at deposit institutions	6,600,000		6,600,000		$ 10,700,000
Cash in foreign institutions	0		0		69,000
Cash equivalents held	$ 10,800,000		$ 10,800,000		$ 11,400,000
Commercial Customer | Revenue Benchmark | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Commercial Customer | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, customer			no		no
Commercial Customer | Accounts Receivable | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%		10.00%
RPD Devices
Summary Of Significant Accounting Policies [Line Items]
Plant and equipment, useful life | Use			200
Plant and equipment, description of depreciation			each purchase of an RPK unit results in a 1/200 depreciation to the RPD