FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets:
Assets, fair value	$ 180,127	$ 181,470
Liabilities:
Liabilities, fair value		675
Derivative liabilities for exit fee
Liabilities:
Liabilities, fair value		675
Level 1
Assets:
Assets, fair value	36,056	18,641
Liabilities:
Liabilities, fair value		0
Level 1 | Derivative liabilities for exit fee
Liabilities:
Liabilities, fair value		0
Level 2
Assets:
Assets, fair value	144,071	162,829
Liabilities:
Liabilities, fair value		0
Level 2 | Derivative liabilities for exit fee
Liabilities:
Liabilities, fair value		0
Level 3
Assets:
Assets, fair value	0	0
Liabilities:
Liabilities, fair value		675
Level 3 | Derivative liabilities for exit fee
Liabilities:
Liabilities, fair value		675
Money market funds
Assets:
Assets, fair value	36,056	18,641
Money market funds | Level 1
Assets:
Assets, fair value	36,056	18,641
Money market funds | Level 2
Assets:
Assets, fair value	0	0
Money market funds | Level 3
Assets:
Assets, fair value	0	0
U.S. government-sponsored agency bonds
Assets:
Assets, fair value	98,290	102,093
U.S. government-sponsored agency bonds | Level 1
Assets:
Assets, fair value	0	0
U.S. government-sponsored agency bonds | Level 2
Assets:
Assets, fair value	98,290	102,093
U.S. government-sponsored agency bonds | Level 3
Assets:
Assets, fair value	0	0
Commercial paper
Assets:
Assets, fair value	42,034	49,654
Commercial paper | Level 1
Assets:
Assets, fair value	0	0
Commercial paper | Level 2
Assets:
Assets, fair value	42,034	49,654
Commercial paper | Level 3
Assets:
Assets, fair value	0	0
Asset-backed securities
Assets:
Assets, fair value	3,747	8,625
Asset-backed securities | Level 1
Assets:
Assets, fair value	0	0
Asset-backed securities | Level 2
Assets:
Assets, fair value	3,747	8,625
Asset-backed securities | Level 3
Assets:
Assets, fair value	$ 0	0
U.S. treasury securities
Assets:
Assets, fair value		2,457
U.S. treasury securities | Level 1
Assets:
Assets, fair value		0
U.S. treasury securities | Level 2
Assets:
Assets, fair value		2,457
U.S. treasury securities | Level 3
Assets:
Assets, fair value		$ 0