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Accumulated Other Comprehensive Income and Reclassifications Adjustments (Tables) | 12 Months Ended
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Apr. 30, 2020
Accumulated Other Comprehensive Income and Reclassifications Adjustments |
Schedule of components of accumulated other comprehensive loss | The components of accumulated other comprehensive loss are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Total Accumulated | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Other | ​
​ | ​ | Available-for-Sale | ​ | Foreign Currency | ​ | Comprehensive | ​
​ |  | Securities |  | Translation Adjustments |  | Loss | ​
Total accumulated other comprehensive loss balance as of April 30, 2019 | ​ | $ | — | ​ | $ | 2 | ​ | $ | 2 | ​
Changes in foreign currency translation adjustments | ​ | ​ | — | ​ | ​ | 276 | ​ | ​ | 276 | ​
Unrealized gains, net of $14 of taxes | ​ | ​ | 50 | ​ | ​ | — | ​ | ​ | 50 | ​
Total accumulated other comprehensive loss balance as of April 30, 2020 | ​ | $ | 50 | ​ | $ | 278 | ​ | $ | 328 | ​

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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