Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	9 Months Ended
Mar. 31, 2013
Statement Of Stockholders Equity [Abstract]
Number of warrants exercised	96,086
Exercise price of warrants	$ 1.13
Cashless exercise of warrants in issuance of common stock	36,186

This element represents cash less exercise of warrants in issuance of common stock.

No definition available.

Name:	usat_CashlessExerciseOfWarrantsInIssuanceOfCommonStock
Namespace Prefix:	usat_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration