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Securities Available for Sale (Details Textual)	6 Months Ended
	Jul. 28, 2012
Securities Available for Sale (Textual) [Abstract]
Short-term investment securities have original maturities greater than (days)	90 days
Maximum [Member]
Securities Available for Sale (Textual) [Abstract]
Anticipated maturity dates range	17 months
Minimum [Member]
Securities Available for Sale (Textual) [Abstract]
Anticipated maturity dates range	1 month

X

- Definition

Anticipated maturity date.

+ References

No definition available.

+ Details

Name:	alot_AnticipatedMaturityDate
Namespace Prefix:	alot_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	alot_SecuritiesAvailableForSaleTextualAbstract
Namespace Prefix:	alot_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Short term investment securities original maturity greater than 90 days.

+ References

No definition available.

+ Details

Name:	alot_ShortTermInvestmentSecuritiesOriginalMaturityGreaterThanNinetyDays
Namespace Prefix:	alot_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration