XML 84 R84.htm IDEA: XBRL DOCUMENT
v2.4.1.9

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 | $ 220 alot_FacilityImpairmentCharges | $ 779 alot_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