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Stock-based Compensation and Stockholders' Equity - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Feb. 28, 2021 | Feb. 28, 2021 | Jul. 14, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted options (in shares) | 100,000,000 | 672,600,000 |
Shares for future issuance (in shares) | 4,100,000 | 4,100,000 |
Unrecognized compensation expense | $ 4,100,000 | $ 4,100,000 |
Repurchase plan authorized amount (up to) | $ 3,800,000 | $ 3,800,000 | $ 10,000,000.0
Treasure shares acquired (in shares) |  | 0 |
RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Awarded (in shares) | 17,500,000 | 188,225,000 |
Weighted-average period (in years) |  | 1 year 6 months 21 days |
Employee Stock Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average period (in years) |  | 2 years 2 months 26 days |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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