ORGANIZATION AND BASIS OF PRESENTATION​ (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) segment	Dec. 31, 2023 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments | segment	1
Cash and short-term investments	$ 185,961	$ 184,299
Accumulated deficit	$ 889,176	$ 846,204