COMMON STOCK, TRANSACTIONS, OTHER (Details) $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 11, 2020	Apr. 16, 2018	Jan. 31, 2019 shares	Jun. 30, 2020 shares	Jun. 30, 2019 shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($) 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	0.04
Issuance of common stock upon vesting of restricted stock units (in shares)				50	21	50	48
Proceeds from exercise of warrants | $						$ 343
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)				50	21	50	48