Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
May 31, 2021 |
May 31, 2020 |
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| Income Tax Contingency [Line Items] | ||
| NOL carry forwards | $ 7.6 | $ 9.7 |
| Reserve for uncertain tax positions | 20.4 | 26.5 |
| Impact uncertain tax benefits, if recognized, on effective income tax rate | 20.4 | $ 26.5 |
| Federal [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards | $ 2.2 | |
| Federal [Member] | Minimum [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards, Expiration date | May 31, 2022 | |
| Federal [Member] | Maximum [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards, Expiration date | May 31, 2037 | |
| State [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards | $ 5.4 | |
| State [Member] | Minimum [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards, Expiration date | May 31, 2022 | |
| State [Member] | Maximum [Member] | ||
| Income Tax Contingency [Line Items] | ||
| NOL carry forwards, Expiration date | May 31, 2040 |
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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