BUSINESS DESCRIPTION (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Apr. 02, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Net loss		$ 4,600
Accumulated deficit		(84,684)		$ (80,094)
Working deficiency		7,000
Net cash used in operating activities		$ (2,334)	$ (1,260)
Proceeds from issuance of common stock			$ 1,260
Common stock, par value		$ 0.01		$ 0.01
Sales Agreement with Alliance Global Partners
Business Acquisition [Line Items]
Proceeds from issuance of common stock	$ 15,400
Sale of common stock	4,501,000
Additional shares available for future sales	$ 6,600
Sales Agreement with Alliance Global Partners | Maximum [Member]
Business Acquisition [Line Items]
Proceeds from issuance of common stock	$ 22,000