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Fair Value Measurements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014
Fair Value Disclosures [Abstract]
Write-down of Asset Held for Sale	$ 220alot_FacilityImpairmentCharges	$ 779alot_FacilityImpairmentCharges

X

- Definition

Facility Impairment Charges

+ References

No definition available.

+ Details

Name:	alot_FacilityImpairmentCharges
Namespace Prefix:	alot_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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