SIGNIFICANT ACCOUNTING POLICIES, NET LOSS PER COMMON SHARE (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Anti-dilutive
Potentially dilutive securities not included in computation of net loss per share because effect would be anti-dilutive (in shares)	6,035,394	6,585,224	4,410,089
Stock options
Anti-dilutive
Potentially dilutive securities not included in computation of net loss per share because effect would be anti-dilutive (in shares)	3,369,245	3,193,785	3,253,310
Warrants
Anti-dilutive
Potentially dilutive securities not included in computation of net loss per share because effect would be anti-dilutive (in shares)	2,166,149	3,391,439	1,156,779
Unvested restricted stock units
Anti-dilutive
Potentially dilutive securities not included in computation of net loss per share because effect would be anti-dilutive (in shares)	500,000