Income Taxes - Reconciliation of the beginning and ending balances of unrecognized tax benefits (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at beginning of period	$ 677,000	$ 677,000	$ 670,000
Additions based on tax positions related to the current year	2,000
Changes to tax positions of prior years			7,000
Settlements
Expirations
Unrecognized tax benefits at end of period	$ 679,000	$ 677,000	$ 677,000