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Product Development Assets | 12 Months Ended
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Apr. 30, 2018
Product Development Assets [Abstract] |
Product Development Assets | Note 8 – Product Development Assets Product development assets consisted of the following at April 30:
|  | 2018 |  |  | 2017 |
Book Composition Costs |  | $ | 24,887 |  |  | $ | 28,884 |
Other Product Development Costs |  |  | 53,927 |  |  |  | 51,501 |
Total |  | $ | 78,814 |  |  | $ | 80,385 |
Book composition costs are net of accumulated amortization of $188.7 million and $172.6 million as of April 30, 2018 and 2017, respectively. Other Product Development Costs are net of accumulated amortization of $49.4 million and $33.5 million as of April 30, 2018 and 2017, respectively.

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