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Goodwill and Other Intangibles (Details) - USD ($) | 12 Months Ended
--- | ---
May 31, 2021 | May 31, 2020 | May 31, 2019
Goodwill and Other Intangibles (Details) [Line Items] |  |  |
Intangible assets acquired | $ 0 | $ 1,600,000 |
Amortization expense | $ 2,200,000 | 3,200,000 | $ 2,800,000
Useful life of intangible assets | 5 years 4 months 24 days |  |
Goodwill, Impairment Loss | $ 0 | $ 0 |
Impairment of Intangible Assets (Excluding Goodwill) | 0 |  |
Additions to intangible assets | 0 |  |
U.S. Book Publishing Business |  |  |
Goodwill and Other Intangibles (Details) [Line Items] |  |  |
Intangible assets acquired | 1,600,000 |  |
Purchase accounting adjustment to finite-lived intangible assets | $ 500,000 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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