NATURE OF OPERATIONS AND GOING CONCERN, BASIS OF PRESENTATION AND RECENT ACCOUNTING PRONOUNCEMENTS - Reverse Stock Split (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Apr. 26, 2022 $ / shares	Mar. 31, 2023 USD ($) $ / shares	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / shares
NATURE OF OPERATIONS AND GOING CONCERN, BASIS OF PRESENTATION AND RECENT ACCOUNTING PRONOUNCEMENTS
Cash and cash equivalents		$ 13,149		$ 16,351
Net loss		(2,332)	$ (2,655)
Working capital		$ 13,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.00001	$ 0.00001		$ 0.00001
Reverse stock split ratio	0.04
Going concern		true
Reverse stock split		On April 26, 2022, the Company effected a reverse stock split of its common stock, par value $0.00001 per share, at a ratio of 1-for-25 (the “2022 Reverse Stock Split”). As a result of the 2022 Reverse Stock Split, (i) every 25 shares of the issued and outstanding common stock were automatically converted into one newly issued and outstanding share of common stock, without any change in the par value per share; (ii) the number of shares of common stock into which each outstanding warrant or option to purchase common stock is exercisable was proportionally decreased, and (iii) the number of authorized shares of common stock outstanding was proportionally decreased. Shares of common stock underlying outstanding stock options and other equity instruments convertible into common stock were proportionately reduced and the respective exercise prices, if applicable, were proportionately increased in accordance with the terms of the agreements governing such securities.