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v3.22.4

Note G - Economic Dependency (Details Textual) - USD ($) $ in Millions | Dec. 31, 2022 | Jun. 30, 2022
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Three Customers [Member] |  |
Accounts Receivable, after Allowance for Credit Loss, Total | $ 7.0 | $ 10.7

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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 310 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126942793&loc=d3e3073-115593 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
Name: | us-gaap_AccountsReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | srt_MajorCustomersAxis=naii_ThreeCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |