SHARE-BASED COMPENSATION - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Number of Options
Ending balance (in shares)	11,533,484
Options to purchase common stock
Number of Options
Beginning balance (in shares)	5,722,449
Granted (in shares)	9,956,611
Exercised (in shares)	(1,538,199)
Forfeited or expired (in shares)	(2,607,377)
Ending balance (in shares)	11,533,484	5,722,449
Vested or expected to vest (in shares)	11,533,484
Exercisable (in shares)	2,901,131
Vested (in shares)	2,901,131
Weighted-Average Exercise Price
Beginning balance (in dollars per share)	$ 17.23
Granted (in dollars per share)	21.61
Exercised (in dollars per share)	12.52
Forfeited or expired (in dollars per share)	25.91
Ending balance (in dollars per share)	19.68	$ 17.23
Vested or expected to vest (in dollars per share)	19.68
Exercisable (in dollars per share)	24.01
Vested (in dollars per share)	$ 24.01
Weighted average remaining contractual term and Aggregate intrinsic value
Outstanding (Weighted Average Remaining Contractual Term)	8 years 6 months	8 years 7 months 20 days
Vested or expected to vest (Weighted Average Remaining Contractual Term)	8 years 6 months
Exercisable (Weighted Average Remaining Contractual Term)	5 years 6 months 14 days
Vested (Weighted Average Remaining Contractual Term)	5 years 6 months 14 days
Outstanding (Aggregate Intrinsic Value)	$ 54,772	$ 68,977
Vested or expected to vest (Aggregate Intrinsic Value)	54,772
Exercisable (Aggregate Intrinsic Value)	6,032
Vested (Aggregate Intrinsic Value)	$ 6,032

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Number of options outstanding, including both vested and non-vested options.

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