FAIR VALUE MEASUREMENTS - Fair Value, Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Total	$ 98,349	$ 97,285
Quoted Prices in Active Markets for Identical Assets (level 1)
Total	98,349	97,285
Money Market Mutual Funds
Cash equivalents	76,204	75,738
Money Market Mutual Funds | Quoted Prices in Active Markets for Identical Assets (level 1)
Cash equivalents	76,204	75,738
US Government Securities
Cash equivalents	2,999	1,990
Short-term investments (available-for-sale debt securities)	19,146	19,557
US Government Securities | Quoted Prices in Active Markets for Identical Assets (level 1)
Cash equivalents	2,999	1,990
Short-term investments (available-for-sale debt securities)	$ 19,146	$ 19,557