STOCKHOLDERS' EQUITY - Schedule of Changes in Number of Shares Outstanding (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Shares issued:
Balance as of January 1	4,508	3,211
Issue of shares on exercises of warrants	2,312	746
Issue of shares on vesting of restricted stock units		278
Issue of shares as consideration for services		243
Balance as of September 30	6,820	4,508
Shares held as treasury stock:
Balance as of January 1	208	111
Purchase of treasury stock		97
Balance as of September 30	208	208
Shares outstanding as of September 30	6,612	4,300
Common Stock | Private Placement
Shares issued:
Issue of shares in private placement		30