Summary of Significant Accounting Policies - Income Taxes (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Accounting Policies [Abstract]
Tax effect on other comprehensive income	$ (989,000)	$ (123,000)	$ 0
Total current income tax benefit arising from the loss from operations	$ 1,000,000