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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 | 47,100 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 119,700 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 720,400 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 261,850 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Weighted-average fair value of common stock | $ 3.01 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 7.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 3.77 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 7.16 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Total compensation cost, net of forfeitures, of all options granted but not yet vested | $ 3,047,463 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |  | $ 3,047,463 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized |
Expected to be recognized |  |  | 1 year 7 months 10 days |
Options exercised | 25,097 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 77,929 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 38,537 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 288,482 us-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 | 538,469 us-gaap_DeferredFinanceCostsNoncurrentGross / dei_LegalEntityAxis = egan_WellsFargoMember |  | 538,469 us-gaap_DeferredFinanceCostsNoncurrentGross / dei_LegalEntityAxis = egan_WellsFargoMember |
Accumulated Amortization of Noncurrent Deferred Finance Costs | 10,017 us-gaap_AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts / dei_LegalEntityAxis = egan_WellsFargoMember |  | 10,017 us-gaap_AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts / dei_LegalEntityAxis = egan_WellsFargoMember |
Financing Interest Expense | $ 10,017 us-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 | 2 egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 1 egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 3 egan_NumberOfCustomersAccountedForMoreThanTenPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 1 egan_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 |

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