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Consolidated Statement of Shareholders' Equity (Parentheticals) (USD $)	3 Months Ended
	Sep. 30, 2011
Statement Of Stockholders Equity [Abstract]
Exercise of warrants (in dollars per share)	$ 2.20

X

- Definition

Exercise price of the warrants.

+ Details

Name:	usat_ExerciseOfWarrantsExercisePrice
Namespace Prefix:	usat
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration