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Provision for Income Taxes (Detail)
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Provision For Income Tax [Line Items]    
Tax provision at U.S. Federal statutory rates 34.00% 34.00%
State income taxes net of federal benefit (0.10%) (0.30%)
Nondeductible permanent items 0.70% (0.70%)
Nontaxable entities 0.30% 5.40%
Other (3.40%) 1.90%
Change in valuation allowance (31.00%) (39.40%)
Effective income tax rate 0.50% 0.90%