Income Tax Benefit - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Current tax benefit or provision	$ 0	$ 0	$ 0
Income taxes paid	0	0	$ 0
Deferred tax benefit or provision	0	0
Statutory tax rate			39.60%
Capital losses carryovers	182,400,000
Net operating loss carryovers	$ 101,500,000
Capital loss carryovers begin to expire	Mar. 31, 2017
Net operating loss carryovers begin to expire	Mar. 31, 2032
Deferred tax asset	$ 112,442,000	108,227,000
Change in valuation allowance against net deferred tax assets	85,500,000	(35,200,000)
Deferred tax assets, valuation allowance	$ 121,486,000	$ 35,966,000