OTHER INCOME (EXPENSE), NET (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Other Income (Expense) Net [Line Items]
Total other income, net	$ 116	$ (160)	$ (332)	$ 1,057	$ (448)	$ (132)	$ 103	$ 617	$ 681	$ 140	$ 1,392
Interest Income [Member]
Other Income (Expense) Net [Line Items]
Total other income, net									365	194	145
Other Income (Expense) [Member]
Other Income (Expense) Net [Line Items]
Total other income, net									$ 316	$ (54)	$ 1,247