Summary of Significant Accounting Policies - Revenue (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Aug. 31, 2021 |
Aug. 31, 2020 |
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| Accounting Policies [Abstract] | ||
| Contract with Customer, Asset, after Allowance for Credit Loss | $ 0 | $ 0 |
| Contract with Customer, Liability | 0 | 0 |
| Revenue from Contract with Customer, Excluding Assessed Tax | 41,000 | 0 |
| Contract with Customer, Liability, Revenue Recognized | 0 | 0 |
| Contract with Customer, Performance Obligation Satisfied in Previous Period | $ 0 | $ 0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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