MARKETABLE SECURITIES - Gross unrealized gains (losses) on marketable securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized Gains	$ 114	$ 122
Gross unrealized (Losses)	(8)	(37)
Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized Gains	91	121
Gross unrealized (Losses)	(7)	(31)
Corporate Obligations
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized Gains	23	1
Gross unrealized (Losses)	$ (1)	$ (6)