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Fair Value Measurements (Tables) | 9 Months Ended
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Jan. 31, 2018
Fair Value Disclosures [Abstract] |
Fair Value of Assets on Recurring Basis | The following table summarizes the fair values of assets that are recorded in the Company’s unaudited condensed consolidated financial statements as of January 31, 2018 and April 30, 2017 at fair value on a recurring basis (in thousands):
|  | Fair Value Measurements
|  | As of January 31, 2018
|  | Level 1 |  | Level 2 |  | Level 3
ASSETS: |  |  |  |  |  |
Certificates of deposit |  | $ | 10,500 |  |  | $ | — |  |  | $ | — |
Mutual funds |  | 1,092 |  |  | — |  |  | — |
Total assets at fair value |  | $ | 11,592 |  |  | $ | — |  |  | $ | — |
|  | As of April 30, 2017
|  | Level 1 |  | Level 2 |  | Level 3
ASSETS: |  |  |  |  |  |
Money market funds |  | $ | 50,146 |  |  | $ | — |  |  | $ | — |
Mutual funds |  | 1,038 |  |  | — |  |  | — |
Certificates of deposit |  | 72,250 |  |  | — |  |  | — |
Total assets at fair value |  | $ | 123,434 |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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