XML 82 R58.htm IDEA: XBRL DOCUMENT v2.4.0.8

Note L - Contingencies (Details)	Dec. 22, 2011
Disclosure Text Block Supplement [Abstract]
Number Of Patents In Lawsuit	3

X

- Definition

Number Of Patents In Lawsuit

+ References

No definition available.

+ Details

Name:	naii_NumberOfPatentsInLawsuit
Namespace Prefix:	naii_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DisclosureTextBlockSupplementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration