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NATURE OF OPERATIONS, BASIS OF PRESENTATION AND RECENT ACCOUNTING PRONOUNCEMENTS - Reverse Stock Split (Details) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended
	Apr. 17, 2020 USD ($)	Apr. 15, 2020 USD ($)	Feb. 11, 2020	May 07, 2020 USD ($)	Mar. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares
Cash and cash equivalents					$ 9,201	$ 6,602
Common stock, par value (in dollars per share) \| $ / shares					$ 0.00001	$ 0.00001
Reverse stock split ratio			0.0333
Going concern					true
Subsequent event
Proceeds from issuance of common stock				$ 6
April 2020 Direct Offering \| Subsequent event
Proceeds from issuance of common stock	$ 3,000	$ 3,000