STOCKHOLDERS' EQUITY - Schedule of Changes in Number of Shares Outstanding (Details) - shares	1 Months Ended		6 Months Ended
	Mar. 31, 2019	Feb. 28, 2019	Jun. 30, 2019	Dec. 31, 2018
Shares issued:
Balance as of January 1			3,211,000
Issue of shares on vesting of restricted stock units			278,000
Issue of shares as consideration for services			243,000
Balance as of June 30			4,499,000
Shares held as treasury stock:
Balance as of January 1			111,245
Purchase of treasury stock			97,000
Balance as of June 30			208,003
Shares outstanding as of June 30			4,290,697	3,100,496
Common Stock
Shares issued:
Issue of shares as consideration for services		200,000
Common Stock | Private Placement
Shares issued:
Issue of shares in private placement	30,000		30,000
Series E Warrants
Shares issued:
Issue of shares on exercises of warrants			662,000
Series C Warrants
Shares issued:
Issue of shares on exercises of warrants			51,000
Series D Warrants
Shares issued:
Issue of shares on exercises of warrants			24,000