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SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			6 Months Ended		114 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)	10,741,937			10,741,937		10,741,937
Unrecognized option employee stock-based compensation costs	$ 106.3			$ 106.3		$ 106.3
Former Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting costs				$ 1.6	$ 4.6
Plan modification costs					$ 2.0
Restricted Stock Units Outstanding
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				4 years
Remaining weighted-average period for stock options and RSUs				3 years 3 months 29 days
Unrecognized employee stock-based compensation costs related to unvested RSUs	$ 14.3			$ 14.3		$ 14.3
Options to Purchase Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				48 months
Expiration period (in years)				10 years
Weighted average fair value per option (in dollars per share)				$ 10.34	$ 11.22
Remaining weighted-average period for stock options and RSUs				2 years 11 months 23 days
Options to Purchase Common Stock \| Former Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan modification costs					$ 0.3
Options to Purchase Common Stock \| Initial Vesting Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting (in percent)				25.00%
Options to Purchase Common Stock \| Subsequent Vesting Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period				36 months
Vesting (in percent)				75.00%
2016 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized for plan (in shares)	8,000,000	2,000,000	2,000,000
Shares available for issuance (in shares)	10,741,937			10,741,937		10,741,937
2016 Employee Stock Purchase Plan \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, fair market value (in percent)				85.00%
Shares available for issuance (in shares)	51,915			51,915		51,915
Issuance of common stock for cash under employee stock purchase plan (in shares)						143,532
2025 Employee Stock Purchase Plan \| Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, fair market value (in percent)	85.00%
Shares available for issuance (in shares)	2,000,000			2,000,000		2,000,000