FAIR VALUE MEASUREMENTS - Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets measured at fair value, total	$ 108,954	$ 120,354
Quoted Prices in Active Markets for Identical Assets (level 1)
Assets measured at fair value, total	108,954	120,354
Money Market Mutual Funds
Cash equivalents	71,326	83,810
Money Market Mutual Funds | Quoted Prices in Active Markets for Identical Assets (level 1)
Cash equivalents	71,326	83,810
U.S. Government Securities
Short-term investments (available-for-sale debt securities)	37,628	36,544
U.S. Government Securities | Quoted Prices in Active Markets for Identical Assets (level 1)
Short-term investments (available-for-sale debt securities)	$ 37,628	$ 36,544