Income Taxes	6 Months Ended
Nov. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 7 Income Taxes At November 30, 2016, the Corporation’s gross deferred tax assets of approximately $48.8 million consist of approximately $33.8 million in federal net operating loss and tax credit carryforwards, $7.6 million in state net operating loss carryforwards and $7.4 million resulting from temporary differences between financial and tax reporting. The federal net operating loss and tax credit carryforwards have a life expectancy of between eleven and twenty years. The state net operating loss carryforwards have a life expectancy, depending on the state where a loss was incurred, between one and twenty years. The Corporation has recorded a full valuation allowance against this asset. If the Corporation, after considering future negative and positive evidence regarding the realization of deferred tax assets, determines that a lesser valuation allowance is warranted, it would record a reduction to income tax expense and the valuation allowance in the period of determination. For the six months ended November 30, 2016, the Corporation utilized previously fully-reserved federal and state net deferred tax assets of $127,000 and $86,000, respectively, and released corresponding amounts of the valuation allowance to offset federal and state income tax expense.

Income Taxes

6 Months Ended

Nov. 30, 2016

NOTE 7 Income Taxes

At November 30, 2016, the Corporation’s gross deferred tax assets of approximately $48.8 million consist of approximately $33.8 million in federal net operating loss and tax credit carryforwards, $7.6 million in state net operating loss carryforwards and $7.4 million resulting from temporary differences between financial and tax reporting. The federal net operating loss and tax credit carryforwards have a life expectancy of between eleven and twenty years. The state net operating loss carryforwards have a life expectancy, depending on the state where a loss was incurred, between one and twenty years. The Corporation has recorded a full valuation allowance against this asset. If the Corporation, after considering future negative and positive evidence regarding the realization of deferred tax assets, determines that a lesser valuation allowance is warranted, it would record a reduction to income tax expense and the valuation allowance in the period of determination.

For the six months ended November 30, 2016, the Corporation utilized previously fully-reserved federal and state net deferred tax assets of $127,000 and $86,000, respectively, and released corresponding amounts of the valuation allowance to offset federal and state income tax expense.