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Investments - Auction rate securities (Details) - Auction rate securities | Apr. 30, 2018 item
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Investments |
Number of available-for-sale securities | 2
Minimum |
Available For Sale Securities |
Maturity period of available-for-sale securities | 1 year
Maximum |
Available For Sale Securities |
Maturity period of available-for-sale securities | 16 years

X
- Definition Represents the maturity period of available-for-sale securities. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition NA + References No definition available. + Details
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Namespace Prefix: | avav_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922888-210455 + Details
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Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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- Details
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