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FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair value of the company financial instruments that are required to be measured at fair value (Parentheticals) (unaudited) (Details)
Mar. 31, 2015
Jun. 30, 2014
Fair Value Disclosures [Abstract]    
Common stock warrant liability, warrants exercise price 2.6058usat_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsOne 2.6058usat_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsOne