Income Tax (Provision) Benefit - Additional Information (Detail) (USD $)	3 Months Ended			9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 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 losses carryforwards	189,300,000			189,300,000		185,400,000
Net operating losses carryforwards	85,200,000			85,200,000		84,500,000
Change in valuation allowance against net deferred tax assets	(32,700,000)	(103,900,000)	103,900,000	8,600,000
Deferred tax assets, valuation allowance	79,762,000			79,762,000
Deferred tax asset	$ 108,720,000			$ 108,720,000