Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jan. 29, 2012
Employee Benefits [Abstract]
Initial percentage compensation contributed by employee (in hundredths)	4.00%
Vesting period of contribution with participants	7 years
Credit to compensation expense for unvested portion	$ 0.1

Credit made to compensation expense for unvested portion of entity match form previous years to employees not employed by entity.

No definition available.

Name:	alcs_DefinedContributionPlanCompensationExpenseUnvestedPortion
Namespace Prefix:	alcs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration