SHAREHOLDERS' EQUITY - Deferred Compensation Arrangement (Details) (USD $)	12 Months Ended	1 Months Ended			12 Months Ended
	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items]
Fair value of shares withheld for tax withholding obligations	$ 2,844,000
Employees and 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	16,866
Employees [Member]
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items]
Fair value of shares issued	749,000				435,000	376,000
Shares withheld for tax withholding obligations (in shares)	8,071				4,672	3,070
Fair value of shares withheld for tax withholding obligations	271,000				154,000	124,000
Non Employee Members of Scientific Advisory Board [Member]
Deferred Compensation Arrangement with Employees and Non-Employees, Share-Based Payments [Line Items]
Fair value of shares issued	$ 323,000				$ 300,000