Income Tax Benefit (Provision) - Additional Information (Detail) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Statutory tax rate	39.60%	39.60%	39.60%
Current tax benefit or provision	$ 0	$ 0	$ 0
Income taxes paid	0	0	0
Capital losses carryovers	187,100,000
Net operating losses carryovers	86,200,000
Capital loss carryovers begin to expire	Mar. 31, 2017
Net operating loss carryovers begin to expire	Mar. 31, 2032
Deferred tax asset	108,227,000	106,867,000
Change in valuation allowance against net deferred tax assets	(35,200,000)	71,200,000
Deferred tax assets, valuation allowance	$ 35,966,000	$ 71,197,000