BUSINESS AGREEMENTS - VA Contract (Details) - VA Contract - item	Apr. 28, 2017	Apr. 29, 2016
Business agreements
Agreement term		1 year
Number of renewal options		4
Term of renewed contract	1 year	1 year

Represents the term of each subsequent renewal period of the agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

Name:	arlz_AgreementTermOfRenewedContract
Namespace Prefix:	arlz_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration