STOCKHOLDERS' EQUITY - Schedule of Changes in Number of Shares Outstanding (Details) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Shares issued:
Balance as of January 1	4,508	3,211
Issue of shares on exercises of warrants	136	737
Issue of shares on vesting of restricted stock units		278
Issue of shares as consideration for services		243
Balance as of June 30	4,644	4,499
Shares held as treasury stock:
Balance as of January 1	208	111
Purchase of treasury stock		97
Balance as of June 30	208	208
Shares outstanding as of June 30	4,436	4,291
Common Stock | Private Placement
Shares issued:
Issue of shares in private placement		30