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RETIREMENT PLAN (Detail Textuals) (USD $) | 12 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2010
Compensation and Retirement Disclosure [Abstract] |  |  |
Maximum percent of voluntary contribution | 100.00% |  |
Company's safe harbor contribution | $ 140,000 |  | $ 160,000
Company's discretionary contribution |  | $ 42,000 |

X
- Definition Amount of safe harbor contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | usat_DefinedContributionPlanEmployersSafeHarborContributionAmount
Namespace Prefix: | usat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration