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						9 Months Ended
	Oct. 09, 2022 USD ($)	Apr. 26, 2022 $ / shares	Sep. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares
Net loss			$ (2,755)	$ (2,719)	$ (2,655)	$ (2,451)	$ (2,309)	$ (2,223)	$ (8,129)	$ (6,983)
Cash and cash equivalents			10,597						10,597		$ 19,031
Working capital			$ 9,100						$ 9,100
Common stock, par value (in dollars per share) | $ / shares		$ 0.00001	$ 0.00001						$ 0.00001		$ 0.00001
Reverse stock split ratio		0.04		0.04
Proceeds from Warrant Exercises										$ 8,509
Common Stock, Shares Authorized | shares			250,000,000						250,000,000		2,000,000
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.
Subsequent event
Proceeds from issuance of common stock and warrants	$ 9,000