RESTRUCTURING CHARGES - Schedule of Restructuring Liability (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges to operations	$ (105)		$ 0	$ 1,929	$ 0
Severance
Restructuring Cost and Reserve [Line Items]
Balance at March 31, 2016		$ 272		272
Restructuring charges to operations		2,000		2,034		$ 500
Cash payments				(1,742)
Other adjustments				(106)
Balance at September 30, 2016	458			458		272
Q3 FY2016 Plan | Severance
Restructuring Cost and Reserve [Line Items]
Balance at March 31, 2016		272		272
Restructuring charges to operations				0
Cash payments				(272)
Other adjustments				0
Balance at September 30, 2016	0			0		272
Q1 FY2017 Plan | Severance
Restructuring Cost and Reserve [Line Items]
Balance at March 31, 2016		$ 0		0
Restructuring charges to operations				2,034
Cash payments				(1,470)
Other adjustments				(106)
Balance at September 30, 2016	$ 458			$ 458		$ 0