BUSINESS DESCRIPTION (Narrative) (Details) - USD ($)			3 Months Ended	12 Months Ended			36 Months Ended
	Jun. 08, 2023	Apr. 14, 2023	Mar. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Jan. 19, 2024	Apr. 13, 2020
Business Acquisition [Line Items]
Net loss					$ 5,800,000
Net cash used in operating activities					(3,559,000)	$ (7,721,000)
Accumulated deficit					(98,150,000)	(92,297,000)
Working capital					500,000
Proceeds from issuance of common stock					2,245,000	129,000
Gain on dissolution of the joint venture					$ 100,000
Reverse stock split description					On September 21, 2023 we filed a Certificate of Amendment to our Third Amended and Restated Certificate of Incorporation with the Secretary of State of Delaware, pursuant to which we effected a 1-for-20 reverse stock split (the “Reverse Stock Split”) of our issued and outstanding common stock. The Reverse Stock Split became effective as of 5:00 p.m. (Eastern Time) on September 21, 2023, and our common stock began trading on a split-adjusted basis on the Nasdaq Capital Market at the market open on September 22, 2023. Unless otherwise indicated, all share amounts, per share data, share prices, exercise prices and conversion rates set forth in these notes and the accompanying consolidated financial statements have, where applicable, been adjusted retroactively to reflect this reverse stock split
Subsequent Events [Member]
Business Acquisition [Line Items]
Aggregate authorized offering price								$ 865,889
Amount available for future sale of shares pursuant to the sales agreement								800,000
AGP 2023 Sales Agreement
Business Acquisition [Line Items]
Aggregate authorized offering price		$ 5,800,000
Proceeds from issuance of common stock		$ 100,000			$ 1,000
Shares issued (in shares)		10,192			25
Amount available for future sale of shares pursuant to the sales agreement					$ 3,700,000
AGP 2023 Sales Agreement | Subsequent Events [Member]
Business Acquisition [Line Items]
Aggregate authorized offering price								865,889
Amount available for future sale of shares pursuant to the sales agreement								$ 800,000
AGP 2023 Sales Agreement | AGP
Business Acquisition [Line Items]
Shares issued (in shares)			10,167	10,189
Payments of stock issuance costs				$ 2,000
Securities purchase agreement
Business Acquisition [Line Items]
Proceeds from issuance of common stock	$ 2,000,000.0
Shares issued (in shares)	206,250
Payments of stock issuance costs	$ 200,000
At The Market Offering Agreement | AGP
Business Acquisition [Line Items]
Aggregate authorized offering price									$ 50,000,000.0
Proceeds from issuance of common stock					$ 500,000	$ 100,000	$ 15,600,000
Shares issued (in shares)					30,827	4,251	260,128
Payments of stock issuance costs							$ 500,000
Maximum | AGP 2023 Sales Agreement
Business Acquisition [Line Items]
Aggregate authorized offering price		$ 5,800,000
Maximum | AGP 2023 Sales Agreement | AGP
Business Acquisition [Line Items]
Proceeds from issuance of common stock			$ 100,000	$ 100,000