ORGANIZATION AND BASIS OF PRESENTATION​ (Details) $ in Thousands	9 Months Ended
	Sep. 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	$ 190,402	$ 184,299
Accumulated deficit	$ 889,985	$ 846,204