NATURE OF OPERATIONS (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of reportable segments | segment			1
Cash and investments	$ 39,600,000		$ 39,600,000
Accumulated deficit	745,536,000		745,536,000		$ 731,170,000
Debt outstanding	0		0
Net loss	5,755,000	$ 9,406,000	14,366,000	$ 15,655,000
Cash used in operations			22,264,000	$ 16,463,000
Lincoln Park Equity Purchase Agreement
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Sale of stock, public float threshold	$ 75,000,000		$ 75,000,000