CONCENTRATION OF CREDIT RISK AND SIGNIFICANT CUSTOMERS - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) Customer	Sep. 30, 2014 Customer	Sep. 30, 2015 USD ($) Customer	Sep. 30, 2014 Customer	Mar. 31, 2015 USD ($) Customer
Concentration Risk [Line Items]
Related party prepaid expenses and other current assets | $	$ 72,218		$ 72,218		$ 13,495
Affiliated Entity
Concentration Risk [Line Items]
Related party prepaid expenses and other current assets | $	$ 53,702		$ 53,702		$ 0
Customer Concentration Risk | Indirect Customer | Accounts receivable
Concentration Risk [Line Items]
Number of customers contributing to more than 10%	0				0
Customer Concentration Risk | Indirect Customer | Sales Revenue
Concentration Risk [Line Items]
Number of customers contributing to more than 10%	0	0	0	0
Customer Concentration Risk | Direct Customer | Accounts receivable
Concentration Risk [Line Items]
Number of customers contributing to more than 10%	1				1
Customer Concentration Risk | Direct Customer | Sales Revenue
Concentration Risk [Line Items]
Number of customers contributing to more than 10%	1	0	1	2
Customer Concentration Risk | Minimum | Indirect Customer | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%				10.00%
Customer Concentration Risk | Minimum | Indirect Customer | Sales Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%	10.00%	10.00%
Customer Concentration Risk | Minimum | Direct Customer | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	10.00%				10.00%
Customer Concentration Risk | Minimum | Direct Customer | Sales Revenue
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%	10.00%	10.00%
Credit Concentration Risk | Danaher | Affiliated Entity
Concentration Risk [Line Items]
Related party prepaid expenses and other current assets | $	$ 53,700		$ 53,700