WARRANTS TO PURCHASE ORDINARY SHARES (Details) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended		12 Months Ended
	May 25, 2017	Apr. 25, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Assumptions used in determination of fair value
Proceeds from warrants exercised by shareholders			$ 4,866
Fair value adjustment for reclassification from warrant liability to equity			5,177
Reevaluation of fair value of warrants to purchase Ordinary Shares			1,360	$ 1,507
Liability related to warrants			10,255		$ 7,078
Warrant to purchase Ordinary Shares | Private Placement
Assumptions used in determination of fair value
Exercise of warrants into Ordinary Shares (in shares)	1,351,766
Proceeds from warrants exercised by shareholders	$ 4,866
Fair value adjustment for reclassification from warrant liability to equity	$ 5,177
Reevaluation of fair value of warrants to purchase Ordinary Shares			1,360
Liability related to warrants			$ 10,255
Warrants issued on August 2016: | Monte Carlo Option Pricing Model | Private Placement
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)	1.65%		1.75%
Expected life (in years)	4 years 2 months 9 days		3 years 10 months 2 days
Expected dividend yield (as a percent)	0.00%		0.00%		0.00%
Fair value per warrant (in dollars)	$ 3.83		$ 1.42		$ 1.08
Warrants issued on August 2016: | Monte Carlo Option Pricing Model | Private Placement | Minimum
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)					1.50%
Expected volatility (as a percent)	65.60%		70.10%		65.50%
Expected life (in years)					3 years 1 month 21 days
Warrants issued on August 2016: | Monte Carlo Option Pricing Model | Private Placement | Maximum
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)					1.84%
Expected volatility (as a percent)	85.00%		97.10%		85.50%
Expected life (in years)					4 years 7 months 2 days
Warrants issued on April 2017: | Monte Carlo Option Pricing Model | Private Placement
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)			1.86%
Expected life (in years)			4 years 6 months 26 days
Expected dividend yield (as a percent)		0.00%	0.00%
Fair value per warrant (in dollars)		$ 2.78	$ 1.14
Warrants issued on April 2017: | Monte Carlo Option Pricing Model | Private Placement | Minimum
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)		1.82%
Expected volatility (as a percent)		65.70%	70.10%
Expected life (in years)		4 years 8 months 23 days
Warrants issued on April 2017: | Monte Carlo Option Pricing Model | Private Placement | Maximum
Assumptions used in determination of fair value
Risk-free interest rate (as a percent)		1.87%
Expected volatility (as a percent)		80.70%	93.20%
Expected life (in years)		5 years