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Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) (USD $)
 9 Months Ended
Apr. 30, 2015
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 1 7,540,000uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroDfGDCXdnnfxF
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 2 1.32uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroZeroFourcbZeroTFourFivenTwokP
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 3 5uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroBMmRrfkwtqrTwo
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 4 $ 3,750,388uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroDGOneylgpJFourxqSeven
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 5 2.90uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroFiveNRvSvkMMggG
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 6 0.94%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroFiveFivesmHSixTwoFqsfS
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 7 0.00%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerovChSevenLyFournZFourBd
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 8 56.28%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroBTSevenRgJZeroFourfZeroEightp
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 9 50,000uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroRkmZeroxEightFourLNSps
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 10 1.20uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroThreesSixTwoTwoOneTwoEightXLOneB
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 11 5uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroJRvkZeroxzgDBLm
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 12 25,430uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerorGRSevenOnehDRDRGThree
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 13 2.90uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroEighttzCJSeventJHVlEight
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 14 0.77%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroTwoZNSixWbswhZSixZ
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 15 0.00%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroQlFNTwoThreeVlRcSixk
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 16 64.54%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeromCZFiveFiveHlmPlhR
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 17 50,000uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroqGgXRxmbDTwoWw
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 18 1.31uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerocwVtRcnBThreeWQs
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 19 5uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerocbvNinegNRcmXFR
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 20 28,714uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerowSevenJTbfkLsSevenLs
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 21 2.90uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroOneCTwoKThreelNyHyJJ
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 22 1.01%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZerotNineRJFwNineTDmhH
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 23 0.00%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroOnesPgddCCrMGz
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 24 66.72%uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroFTlfNgXQLNineNineF
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 25 7,640,000uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroTLMThreeMFiveFdKZEightP
Capital Stock Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 26 $ 3,804,532uec_ScheduleOfSharebasedPaymentAwardStockOptionsValuationAssumptionsZeroTwoEightSixSixZeroGZJmNhSevenKThreePrc