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Redeemable Convertible Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Thousands							1 Months Ended		2 Months Ended	3 Months Ended
	Dec. 06, 2023 USD ($) $ / shares shares	Nov. 03, 2023 USD ($) shares	Sep. 08, 2023 USD ($) shares	Mar. 02, 2023 USD ($) $ / shares shares	Apr. 26, 2022 investor $ / shares shares	Dec. 23, 2020 USD ($) $ / shares shares	Jul. 31, 2022 investor shares	Mar. 31, 2022 USD ($) $ / shares	Nov. 03, 2023 USD ($)	Sep. 30, 2023 USD ($) shares	Mar. 31, 2023 USD ($) shares	Sep. 30, 2024 $ / shares shares	Sep. 14, 2024 shares	Sep. 12, 2024 shares	Jun. 30, 2024 shares	Mar. 31, 2024 shares	Dec. 31, 2023 $ / shares shares	Jun. 30, 2023 shares	Dec. 31, 2022 shares
Temporary Equity [Line Items]
Redeemable convertible preferred stock, par value (in usd per share) | $ / shares					$ 0.0001
Redeemable convertible preferred stock, authorized (in shares)													0
Redeemable convertible preferred stock, shares outstanding (in shares)													0
Seed Series Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Shares issued (in shares)					5,350,000
Redeemable convertible preferred stock, par value (in usd per share) | $ / shares					$ 0.0001							$ 0.0001					$ 0.0001
Price per share (in usd per share) | $ / shares					$ 1.00			$ 1.00
Redeemable convertible preferred stock, authorized (in shares)				81,790,144	50,940,144							0					81,790,144
Proceeds from issuance of preferred stock and preferred stock tranche rights, net | $								$ 5,400
Number of investors | investor					2		2
Redeemable convertible preferred stock, shares outstanding (in shares)										81,790,144	81,790,144	0		81,790,144	81,790,144	81,790,144	81,790,144	81,790,144	81,790,144
Seed Series Redeemable Convertible Preferred Stock | Two Investors
Temporary Equity [Line Items]
Shares issued (in shares)						4,000,000	3,000,000
Redeemable convertible preferred stock, shares outstanding (in shares)												7,000,000
Seed Series Redeemable Convertible Preferred Stock | Two Investors, Relatives Of Board Member
Temporary Equity [Line Items]
Shares issued (in shares)						350,000
Series B Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Shares issued (in shares)				37,073,162						39,024,386	37,073,162
Redeemable convertible preferred stock, par value (in usd per share) | $ / shares												$ 0.0001					$ 0.0001
Price per share (in usd per share) | $ / shares				$ 1.025
Net proceeds from issuance | $		$ 6,000	$ 8,000							$ 39,817	$ 37,185
Gross proceeds from issuance | $				$ 37,800
Redeemable convertible preferred stock, authorized (in shares)												0					105,595,101
Redeemable convertible preferred stock, shares outstanding (in shares)										76,097,548	37,073,162	0		105,595,101	105,595,101	105,595,101	105,595,101	37,073,162	0
Series B Redeemable Convertible Preferred Stock, Milestone Shares
Temporary Equity [Line Items]
Shares issued (in shares)		29,497,553	39,024,386	68,521,939
Net proceeds from issuance | $									$ 69,900
Initial fair value of liability | $				$ 600
Series C Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Shares issued (in shares)	119,599,872
Redeemable convertible preferred stock, par value (in usd per share) | $ / shares												$ 0.0001					$ 0.0001
Price per share (in usd per share) | $ / shares	$ 1.3796
Net proceeds from issuance | $	$ 164,600
Redeemable convertible preferred stock, authorized (in shares)												0					119,599,872
Redeemable convertible preferred stock, shares outstanding (in shares)												0		119,599,872	119,599,872	119,599,872	119,599,872
Purchase price for put option (in usd per share) | $ / shares	$ 1.00
Biocon Limited | Seed Series Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Shares issued (in shares)						40,000,000
Redeemable convertible preferred stock, par value (in usd per share) | $ / shares						$ 0.0001
Price per share (in usd per share) | $ / shares						$ 1.00
Net proceeds from issuance | $						$ 40,000

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