Income Taxes - Additional Information (Detail)	6 Months Ended
	Sep. 30, 2015 USD ($)
Income Tax Contingency [Line Items]
Alternative Minimum Tax Credit	$ 518,000
Valuation allowance	1,543,000
Liability relating to uncertain tax positions	255,000
Income tax benefits, research and development credit	0
Federal
Income Tax Contingency [Line Items]
Research and development tax credit carryforward	1,380,000
State
Income Tax Contingency [Line Items]
Research and development tax credit carryforward	$ 1,744,000