BASIS OF PRESENTATION - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2010
Property, Plant and Equipment [Line Items]
Impairment of Project Horizon		$ 0	$ 2,500	$ 0	$ 2,502	$ 0	$ 5,000	$ 58,100
Proceeds from asset sales					$ 1,577	$ 105
Asset under Construction [Member]
Property, Plant and Equipment [Line Items]
Proceeds from asset sales	$ 1,300