INCOME TAXES - Schedule of Federal Statutory Income Tax Rate to Effective Tax Rate (Details)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate	35.00%	35.00%	35.00%
State taxes, net of federal tax effect	9.70%	3.10%	3.20%
Research and development tax credits	(8.20%)	13.00%	(1.40%)
Effect of foreign operations	(6.70%)	(18.20%)	0.10%
Meals and entertainment	2.50%	(3.50%)	0.50%
Domestic production activities deduction	(4.00%)	9.20%	(2.90%)
Change in valuation allowance	(0.10%)	0.70%	0.40%
Transaction costs	0.00%	(19.10%)	0.00%
Foreign withholding	3.80%	(6.10%)	0.00%
Other permanent differences	4.20%	(1.60%)	0.70%
Total effective income tax rate	36.20%	12.50%	35.60%