Income Tax Provision - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Statutory tax rate	39.60%	39.60%	39.60%	39.60%
Current tax benefit or provision	$ 0	$ 0	$ 0	$ 0
Income taxes paid	0	0	0	0
Capital loss carryovers	185,100,000		185,100,000		185,400,000
Net operating loss carryforwards	83,800,000		83,800,000		84,500,000
Valuation allowance against net deferred tax assets	71,600,000	103,900,000	41,300,000	103,900,000
Deferred tax assets, valuation allowance	112,469,000		112,469,000
Deferred tax asset	$ 106,473,000		$ 106,473,000