Summary of Significant Accounting Policies - Additional Information (Detail)		3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 17, 2021	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment $ / shares shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Sep. 26, 2022 $ / shares shares	Oct. 31, 2019 $ / shares shares
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment				1
Allowance for doubtful accounts		$ 32,000		$ 32,000		$ 200,000
Allowance for credit losses		0		0		0
Receivables written off				0		0
Depreciation expense		47,000	$ 44,000	146,000	$ 125,000
Loss contingency accrual		$ 0		$ 0		$ 0
Number of warrants issued to purchase common stock (in shares) | shares								40,000
Warrants exercise price (in dollars per share) | $ / shares								$ 7.29
Employee Stock Purchase Plan
Summary Of Significant Accounting Policies [Line Items]
Offering period	6 months			6 months
Private Placement Financing | Purchase Agreement | Pre-Funded Warrant
Summary Of Significant Accounting Policies [Line Items]
Number of warrants issued to purchase common stock (in shares) | shares		2,426,493		2,426,493			2,426,493
Warrants exercise price (in dollars per share) | $ / shares		$ 0.0001		$ 0.0001			$ 0.0001
Product Sales Allowance
Summary Of Significant Accounting Policies [Line Items]
Deduction from gross product sales for allowances		$ 1,710,000	$ 1,269,000	$ 4,695,000	$ 3,399,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful lives		3 years		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful lives		5 years		5 years
Term of options granted				10 years
Customer One | Revenue Benchmark | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage		54.00%	56.00%	55.00%	54.00%
Customer One | Accounts Receivable | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage				60.00%
Customer Two | Revenue Benchmark | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage		44.00%	44.00%	44.00%	46.00%
Customer Two | Accounts Receivable | Customer Concentration Risk
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage				40.00%