Stockholders' Equity - Additional Information (Detail)							1 Months Ended			9 Months Ended		14 Months Ended	15 Months Ended	24 Months Ended
	May 21, 2024 shares	May 20, 2024 shares	Mar. 04, 2024 USD ($) $ / shares shares	Jul. 26, 2023 USD ($)	Apr. 03, 2023 USD ($) $ / shares shares	Mar. 18, 2022 USD ($)	Oct. 31, 2015 shares	May 31, 2015 USD ($) Tranche $ / shares shares	Feb. 28, 2014 Tranche $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 shares	Sep. 30, 2024 $ / shares shares	Dec. 31, 2016 USD ($)	Mar. 18, 2024 shares	Jul. 31, 2023 USD ($) shares	Dec. 31, 2023 $ / shares shares	Feb. 20, 2014 USD ($)
Equity [Line Items]
Preferred stock, shares authorized										10,000,000		10,000,000				10,000,000
Preferred stock, par value | $ / shares										$ 0.00001		$ 0.00001				$ 0.00001
Preferred stock, shares outstanding										0		0				0
Common stock, shares authorized										300,000,000		300,000,000				300,000,000
Common stock, par value | $ / shares										$ 0.00001		$ 0.00001				$ 0.00001
Number of common stock for issuance in exchange for future services from founders									1,000,000
Common stock price per share | $ / shares									$ 0.01
Number of tranches | Tranche								2	2
Unrecognized compensation expense | $								$ 62,000									$ 168,000
Common stock shares repurchased								633,810
Repurchase of common stock from stockholders, per share | $ / shares								$ 0.00001
Remaining number of repurchased shares								366,190
Performance Shares [Member]
Equity [Line Items]
Shares vested							183,095
ATM Agreement [Member]
Equity [Line Items]
Gross proceeds from common stock issuance | $				$ 151,900,000
Shelf registration statement expiry date				Jul. 26, 2026
April 2023 Offering [Member]
Equity [Line Items]
Common stock sold					19,828,300
Proceeds from issuance of common stock net | $					$ 270,000,000
Offering price per share | $ / shares					$ 14.5
Sale of stock, shares issued					2,586,300
March 2024 Offering [Member]
Equity [Line Items]
Treasury shares sold			2,193,251
Common stock sold			7,441,650
Proceeds from issuance of common stock net | $			$ 597,100,000
Offering price per share | $ / shares			$ 85
Sale of stock, shares issued			970,650
Common Stock [Member]
Equity [Line Items]
Common stock sold										8,867,953	20,006,504
Common Stock [Member] | ATM Agreement [Member]
Equity [Line Items]
Common stock sold												1,426,303			1,587,404
Proceeds from issuance of common stock net | $															$ 13,600,000
Repurchase Program [Member]
Equity [Line Items]
Repurchase of common stock (in shares)														729,034
Stock repurchase program, additional maturity period						2 years
Stock repurchase program, termination date						Mar. 18, 2024
Maximum [Member] | Repurchase Program [Member]
Equity [Line Items]
Purchase of common stock and warrants | $						$ 50,000,000
2014 ESPP [Member]
Equity [Line Items]
Shares issued under ESPP		166,816								166,816	95,357
2024 ESPP [Member]
Equity [Line Items]
Shares issued under ESPP	5,500,000									0	0
Tranche One [Member]
Equity [Line Items]
Number of common stock for issuance in exchange for future services from founders									500,000
Stock compensation expense | $										$ 0			$ 31,000
Tranche Two [Member]
Equity [Line Items]
Remaining number of repurchased shares								183,095