Redeemable Convertible Preferred Stock and Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ / shares in Units, $ in Millions, $ in Millions	1 Months Ended				6 Months Ended	13 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares	Jan. 31, 2019 USD ($) $ / shares shares	Nov. 30, 2018 USD ($) $ / shares shares	Oct. 31, 2016 USD ($) $ / shares shares	Jun. 30, 2024 $ / shares shares	Oct. 31, 2016 CAD ($) shares	Oct. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Aug. 15, 2023 $ / shares	Jul. 25, 2023 $ / shares shares	Oct. 31, 2016 $ / shares
Class of Stock [Line Items]
Shares issued, price per share | $ / shares									$ 12
Common stock, par or stated value per Share | $ / shares					$ 0.001			$ 0.001		$ 0.001
Common stock, shares authorized					490,000,000			490,000,000		490,000,000
Common Stock [Member]
Class of Stock [Line Items]
Conversion of redeemable convertible preferred stock into common stock					12,493,879
Series A Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Number of stock classified as temporary equity issued during the period						11,250,000	11,250,000
Shares issued, price per share | (per share)				$ 0.74			$ 0.74				$ 1
Foreign exchange rate				1.344			1.344				1.344
Value of new stock classified as temporary equity issued during the period						$ 10.9	$ 8.1
Series B1 Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Number of stock classified as temporary equity issued during the period				16,285,156
Shares issued, price per share | $ / shares				$ 0.77			$ 0.77
Proceeds from Issuance of redeemable convertible preferred stock | $				$ 12.3
Series B2 Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Number of stock classified as temporary equity issued during the period			25,065,538
Shares issued, price per share | $ / shares			$ 1.15
Proceeds from Issuance of redeemable convertible preferred stock | $			$ 28.9
Series C Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Number of stock classified as temporary equity issued during the period		17,905,288
Shares issued, price per share | $ / shares		$ 2.35
Proceeds from Issuance of redeemable convertible preferred stock | $		$ 41.8
Series D Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Number of stock classified as temporary equity issued during the period	29,285,356
Shares issued, price per share | $ / shares	$ 2.73
Proceeds from Issuance of redeemable convertible preferred stock | $	$ 79.8