COMMON STOCK, TRANSACTIONS, OTHER (Details) $ in Thousands			1 Months Ended	3 Months Ended
	Feb. 11, 2020	Apr. 16, 2018 shares	Jan. 31, 2019 shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2019 USD ($) shares
Common stock disclosures
Stock issued under ESPP (in shares)			36
Proceeds from issuance of stock under ESPP | $					$ 1
Reverse stock split ratio	0.0333
Issuance of common stock upon vesting of restricted stock units (in shares)					27
Proceeds from exercise of warrants | $				$ 286
Common Stock
Common stock disclosures
Stock issued under ESPP (in shares)				0	36
Stock issued during period, shares, reverse stock splits		7,692
Issuance of common stock upon vesting of restricted stock units (in shares)					27