Income Taxes (Details 3) (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013
Tax credit carryforwards
Unrecognized deferred tax liability			$ 0
Additional disclosure of unrecognized tax benefits
U.S. income or foreign tax withholding			0
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at the beginning of the period	103,000	119,000
Reductions based on tax positions taken during a prior period		(16,000)
Reductions based on settlements with taxing authorities	(103,000)
Balance at the end of the period		103,000
U.S. Federal
Tax credit carryforwards
Tax credit carryforwards			3,200,000
State
Tax credit carryforwards
Tax credit carryforwards			$ 3,400,000