Business Combinations (Schedule Of Contingent Earn-Outs) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jan. 31, 2015	Jan. 31, 2014
Business Combinations [Abstract]
Beginning Balance	$ 448	$ 721
Additions	711
Payments	(292)	(283)
Imputed interest recognized	28	43
Gain on change in fair market value		(26)
Ending Balance	895	455
Business acquisition contingent consideration less current portion	(668)	(286)
Business acquisition contingent consideration Ending balance - long term	$ 227	$ 169

Business acquisition contingent consideration Ending balance - long term

No definition available.

Name:	aris_BusinessAcquisitionContingentConsiderationEndingBalanceLongTerm
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business Acquisition, Contingent Consideration, Imputed Interest Recognized

+ References

No definition available.

+ Details

Name:	aris_BusinessAcquisitionContingentConsiderationImputedInterestRecognized
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Business acquisition contingent consideration less current portion

+ References

No definition available.

+ Details

Name:	aris_BusinessAcquisitionContingentConsiderationLessCurrentPortion
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business Acquisition, Contingent Consideration, Net Payments

+ References

No definition available.

+ Details

Name:	aris_BusinessAcquisitionContingentConsiderationNetPayments
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business acquisition fair value of additions

+ References

No definition available.

+ Details

Name:	aris_BusinessAcquisitionFairValueOfAdditions
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Business acquisition, fair value of contingent consideration.

+ References

No definition available.

+ Details

Name:	aris_BusinessAcquisitionFairValueOfContingentConsideration
Namespace Prefix:	aris_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Definition

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

+ Details

Name:	us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration