FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets:
Cash equivalents	$ 225,464	$ 280,052
Quoted Market Prices for Identical Assets in Active Markets (Level 1)
Assets:
Cash equivalents	225,464	280,052
Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	0	0
Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	0	0
Money market funds
Assets:
Cash equivalents	225,464	280,052
Money market funds | Quoted Market Prices for Identical Assets in Active Markets (Level 1)
Assets:
Cash equivalents	225,464	280,052
Money market funds | Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents	0	0
Money market funds | Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	$ 0	$ 0