Income Taxes (Details Textual) (USD $)	12 Months Ended
	May 31, 2013	May 31, 2012
Income Taxes (Textual) [Abstract]
Federal and state income tax benefit	$ 0	$ 0
Statutory federal income tax rate	34.00%	34.00%
Federal net operating loss and tax credit carryforwards life expectancy	20 years
State net operating loss carryforwards life expectancy, minimum	5 years
State net operating loss carryforwards life expectancy, maximum	20 years
Interest or penalties related to income tax	0	0
Unrecognized tax benefits	0	0
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss and tax credit carryforwards	78,000,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss and tax credit carryforwards	$ 95,000,000