| Component: (Network and Table) | |
|---|---|
| Network | 40301 - Disclosure - Capitalized And Purchased Software Product Costs (Schedule Of Capitalized And Purchased Software Product Costs) (Details) (http://www.arinet.com/role/DisclosureCapitalizedAndPurchasedSoftwareProductCostsScheduleOfCapitalizedAndPurchasedSoftwareProductCostsDetails) | 
| Table | Statement [Table] | 
| Reporting Entity [Axis] | 0000879796 (http://www.sec.gov/CIK) | 
| Statement [Line Items] | Period [Axis] | |||||||
|---|---|---|---|---|---|---|---|---|
| 2012-08-01 - 2013-07-31 | 2011-08-01 - 2012-07-31 | |||||||
| Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | |||||||
| Internally Developed Software For Sale To Customers [Member] | Amortization Of Software Product For Sale To Customers [Member] | Net Balance For Software Product Cost And Accumulated Amortization [Member] | Property Plant And Equipment Type [Domain] | Internally Developed Software For Sale To Customers [Member] | Amortization Of Software Product For Sale To Customers [Member] | Net Balance For Software Product Cost And Accumulated Amortization [Member] | Property Plant And Equipment Type [Domain] | |
| Begnning Balance of Amounts capitalized for software product costs | 18,247,000   | (15,298,000)  | 2,949,000   | 18,247,000   | 16,693,000   | (13,878,000)  | 2,815,000   | |
| Capitalized costs | 1,686,000   | 1,686,000   | 1,554,000   | 1,554,000   | ||||
| Acquired software | 1,316,000   | 1,316,000   | ||||||
| Disposals | (435,000)  | 435,000   | ||||||
| Amortization expense | (1,741,000)  | (1,741,000)  | (1,420,000)  | (1,420,000)  | ||||
| Ending Balance of Amounts capitalized for software product costs | 20,814,000   | (16,604,000)  | 4,210,000   | 20,814,000   | 18,247,000   | (15,298,000)  | 2,949,000   | 18,247,000   | 
| Net capitalized software product costs | 4,210,000   | 2,949,000   | ||||||
| Less accumulated amortization | (16,604,000)  | (15,298,000)  | ||||||