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Summary of Business and Significant Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Description Of Business And Significant Accounting Policies [Line Items]        
License sales to resellers as a percentage of total revenue 10.00%egan_PercentageOfSalesInRespectOfRevenuesThroughResellers 2.00%egan_PercentageOfSalesInRespectOfRevenuesThroughResellers 20.00%egan_PercentageOfSalesInRespectOfRevenuesThroughResellers 9.00%egan_PercentageOfSalesInRespectOfRevenuesThroughResellers
Life of customer cloud relationship     28 months  
Common stock granted during the period 47,100us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 119,700us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 720,400us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 261,850us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Weighted-average fair value of common stock $ 3.01us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 7.44us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 3.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 7.16us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Total compensation cost, net of forfeitures, of all options granted but not yet vested $ 3,047,463us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized   $ 3,047,463us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized  
Expected to be recognized     1 year 7 months 10 days  
Options exercised 25,097us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 77,929us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 38,537us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised 288,482us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Minimum        
Description Of Business And Significant Accounting Policies [Line Items]        
Cloud agreements initial term     1 year  
Customer Contracts Term Length     12 months  
Accounts receivable collection period     30 days  
Maximum        
Description Of Business And Significant Accounting Policies [Line Items]        
Cloud agreements initial term     2 years  
Customer Contracts Term Length     36 months  
Accounts receivable collection period     90 days  
Wells Fargo Member        
Description Of Business And Significant Accounting Policies [Line Items]        
Deferred Finance Costs, Noncurrent, Gross 538,469us-gaap_DeferredFinanceCostsNoncurrentGross
/ dei_LegalEntityAxis
= egan_WellsFargoMember
  538,469us-gaap_DeferredFinanceCostsNoncurrentGross
/ dei_LegalEntityAxis
= egan_WellsFargoMember
 
Accumulated Amortization of Noncurrent Deferred Finance Costs 10,017us-gaap_AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts
/ dei_LegalEntityAxis
= egan_WellsFargoMember
  10,017us-gaap_AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts
/ dei_LegalEntityAxis
= egan_WellsFargoMember
 
Financing Interest Expense $ 10,017us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= egan_WellsFargoMember
     
Sales | Customer Concentration Risk        
Description Of Business And Significant Accounting Policies [Line Items]        
Customer accounted for more than ten percent of total revenue 2egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
1egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
3egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
1egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
Sales | Customer Concentration Risk | Customer One        
Description Of Business And Significant Accounting Policies [Line Items]        
Concentration Risk, Percentage 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerOneMember
16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerOneMember
13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerOneMember
18.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerOneMember
Sales | Customer Concentration Risk | Customer Two        
Description Of Business And Significant Accounting Policies [Line Items]        
Concentration Risk, Percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerTwoMember
  11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerTwoMember
 
Sales | Customer Concentration Risk | Customer Three        
Description Of Business And Significant Accounting Policies [Line Items]        
Concentration Risk, Percentage     10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= egan_CustomerThreeMember