Description of the terms of a credit facility arrangement.

No definition available.

Name:	usat_LineOfCreditFacilityInterestRateOneVariableRateBasis
Namespace Prefix:	usat_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum amount borrowed under the credit facility of condition one at any time during the period.

+ References

No definition available.

+ Details

Name:	usat_LineOfCreditFacilityMaximumBorrowingCapacityConditionOneBaseAmount
Namespace Prefix:	usat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The percentage of line of credit facility maximum borrowing capacity condition two additional eligibility based on segmental revenue.

+ References

No definition available.

+ Details

Name:	usat_LineOfCreditFacilityMaximumBorrowingCapacityConditionTwoAdditionalEligibilityBasedOnSegmentalRevenuePercentage
Namespace Prefix:	usat_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents amounts of advanced on account of processing revenues and service fees shall not exceed limit given during the period.

+ References

No definition available.

+ Details

Name:	usat_LineOfCreditFacilityMaximumBorrowingCapacityConditionTwoAdditionalMaximumEligibilityAmountBasedOnSegmentalRevenue
Namespace Prefix:	usat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of Eligible accounts receivable expressed as percent as defined in the loan documents.

+ References

No definition available.

+ Details

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Namespace Prefix:	usat_
Data Type:	num:percentItemType
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- Definition

Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityDescription
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of share instruments newly issued under a share-based compensation plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

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SUBSEQUENT EVENTS (Detail textuals) (USD $)	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	0 Months Ended		1 Months Ended	0 Months Ended
SUBSEQUENT EVENTS (Detail textuals) (USD $)	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Stock Incentive Plan 2012	Mar. 31, 2013 Stock Incentive Plan 2012	Sep. 30, 2012 Stock Incentive Plan 2012 CEO	Mar. 31, 2013 Stock Incentive Plan 2012 CEO	Jul. 10, 2012 Line Of Credit	Jul. 10, 2012 Line Of Credit Avidbank (the "Bank")	Apr. 30, 2013 Subsequent Event Stock Incentive Plan 2012 CEO	Apr. 15, 2013 Subsequent Event Line Of Credit Avidbank (the "Bank")
Subsequent Event [Line Items]
Line of credit facility, description							The Loan Documents provide that the aggregate amount of advances under the Line of Credit shall not exceed the lesser of (i) $3.0 million, or (ii) 75% of eligible accounts receivable as defined in the Loan Documents plus 80% of the prior two months transaction processing revenues and networking service fees as defined in the Loan Documents, provided that the amounts advanced on account of such processing revenues and service fees shall not exceed $2,000,000 without the Bank's prior consent, after the First Amendment entered into on January 2, 2013.			The Third Amendment provides that the aggregate amount of advances now available to the Company under the Line of Credit cannot exceed the lesser of (i) $5.0 million, or (ii) 80% of the prior three months transaction processing revenues and networking service fees as defined in the Loan Agreement.
Maximum limit of amount under line of credit								$ 3,000,000		$ 5,000,000
Maximum limit of amount of advances under Line of Credit								3,000,000		5,000,000
Line of credit facility, basis of measurement								Prime rate
Percentage limit of eligible accounts receivable								75.00%
Percentage of prior months transaction processing revenues and networking service fees								80.00%		80.00%
Threshold limit of processing revenues and service fees								$ 2,000,000
Number of common stock issued (in shares)	5,480	195,278	46,696	218,694	71,429	23,810			23,810