INCOME TAXES - Schedule of Federal Statutory Income Tax Rate to Effective Tax Rate (Details)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate	31.55%	35.00%	35.00%
State taxes, net of federal tax effect	6.90%	9.70%	3.10%
Research and development tax credits	39.50%	(8.20%)	13.00%
Effect of foreign operations	15.50%	(6.70%)	(18.20%)
Meals and entertainment	(6.70%)	2.50%	(3.50%)
Domestic production activities deduction	13.80%	(4.00%)	9.20%
Change in valuation allowance	(0.20%)	(0.10%)	0.70%
Transaction costs	0.00%	0.00%	(19.10%)
2017 tax act	454.10%	0.00%	0.00%
Foreign withholding	(21.00%)	3.80%	(6.10%)
Other permanent differences	(5.80%)	4.20%	(1.60%)
Total effective income tax rate	527.70%	36.20%	12.50%