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Consolidated Statement of Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	9 Months Ended
	Mar. 31, 2012
Statement Of Stockholders Equity [Abstract]
Exercise of warrants (in dollars per share)	$ 2.20

X

- Definition

Exercise price of the warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	usat_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration