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Product Development Assets (Tables) | 12 Months Ended
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Apr. 30, 2017
Product Development Assets [Abstract] |
Components of Product Development Assets | Product development assets consisted of the following at April 30 (in thousands):
| 2017 | 2016 |
Book Composition Costs | $28,884 | $34,697 |
Royalty Advances | 28,320 | 31,182 |
Other Product Development Costs | 42,071 | 6,247 |
Total | $99,275 | $72,126 |
Book composition costs are net of accumulated amortization of $172.6 million and $179.6 million as of April 30, 2017 and 2016, respectively. Other Product Development Costs are net of accumulated amortization of $26.4 million and $19.7 million as of April 30, 2017 and 2016, respectively. The increase in Other Product Development Costs was principally due to the Atypon acquisition ($28 million) and other spending to support business growth.

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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