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Warranty Reserves (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jul. 31, 2021 | Aug. 01, 2020
Warranty Reserves |  |
Beginning balance | $ 2,341 | $ 2,015
Balance acquired from acquisition | 256 |
Warranty expense | 456 | 451
Warranty costs settled | (299) | (435)
Ending balance | $ 2,754 | $ 2,031

X
- Definition Represents the aggregate of (i) the increase in the liability for accruals related to standard product warranties issued during the reporting period and (ii) the increase or decrease in the liability during the reporting period for accruals related to pre-existing standard product warranties (including adjustments related to changes in estimates). Does not include any increase in the liability for accruals related to extended product warranties. + References No definition available. + Details
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Namespace Prefix: | avav_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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Period Type: | instant

X
- Definition Amount of increase in the standard product warranty accrual from a business acquisition. Excludes extended product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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Namespace Prefix: | us-gaap_
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X
- Definition Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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