Consolidated Statement of Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	9 Months Ended
Mar. 31, 2014
Statement Of Stockholders Equity [Abstract]
Exercise of warrants at $1.13 in the issuance of common stock	2,090,226
Exercise price of warrants (in dollars per share)	$ 1.13

This element represents number of warrants exercised.

No definition available.

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