SEGMENT REPORTING - Schedule of Direct Expenses With Respect to Program Segments (Details) $ in Thousands	3 Months Ended		132 Months Ended
	Mar. 31, 2025 USD ($) segment	Mar. 31, 2024 USD ($)	Mar. 31, 2025 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	1
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 130	$ 148	$ 223,600
Total research and development expenses	6,659	10,397
Total general and administrative expenses	6,021	7,168
Total operating expenses	12,680	17,565
Operating loss	(12,550)	(17,417)
Other (income) expense	(2,315)	(5,723)
Net loss	(10,235)	(11,694)
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	130	148
Payroll and payroll-related expenses	1,837	2,937
Total direct program expenses	4,244	6,697
Other research and development expenses	578	763
Total research and development expenses	6,659	10,397
Payroll and payroll-related expenses	3,130	3,891
Legal and professional fees	1,451	1,673
General office expenses	1,440	1,604
Total general and administrative expenses	6,021	7,168
Total operating expenses	12,680	17,565
Operating loss	(12,550)	(17,417)
Other (income) expense	(2,315)	(5,723)
Net loss	(10,235)	(11,694)
Reportable Segment | OV350/KCC2 library
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total direct program expenses	2,778	1,778
Reportable Segment | OV888 (GV101)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total direct program expenses	339	2,840
Reportable Segment | OV329
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total direct program expenses	859	1,239
Reportable Segment | Gensaic projects
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total direct program expenses	0	521
Reportable Segment | Other programs
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total direct program expenses	$ 268	$ 318