COMMON STOCK, TRANSACTIONS, OTHER (Details) $ in Thousands			12 Months Ended
	Apr. 16, 2018	Apr. 16, 2018 shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Common stock disclosures
Proceeds from issuance of stock under ESPP | $			$ 1	$ 4
Reverse stock split ratio	0.04
Issuance of common stock upon vesting of restricted stock units (in shares)				143
Proceeds from exercise of warrants | $				$ 131
Common Stock
Common stock disclosures
Stock issued under ESPP (in shares)			36	48
Proceeds from issuance of stock under ESPP | $				$ 4
Stock issued during period, shares, reverse stock splits		92
Issuance of common stock upon vesting of restricted stock units (in shares)			143	143