SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement (Details) (USD $)	9 Months Ended		3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014 Employees and Non Employee Members of Scientific Advisory Board [Member]	Mar. 31, 2013 Employees and Non Employee Members of Scientific Advisory Board [Member]	Dec. 31, 2013 Employees [Member]	Dec. 31, 2012 Employees [Member]	Dec. 31, 2013 Non Employee Members of Scientific Advisory Board [Member]	Dec. 31, 2012 Non Employee Members of Scientific Advisory Board [Member]
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items]
Shares issued (in shares)			31,301	22,568
Fair value of shares issued					$ 746,000	$ 435,000	$ 323,000	$ 300,000
Shares withheld for tax withholding obligations (in shares)					8,071	4,672
Fair value of shares withheld for tax withholding obligations	$ 2,600,000	$ 3,000,000			$ 271,000	$ 154,000