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Acquisition - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Aug. 06, 2014 shareholder | Jul. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2014 | Jun. 30, 2014
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 13,230,000 us-gaap_Goodwill | $ 13,230,000 us-gaap_Goodwill | $ 4,880,000 us-gaap_Goodwill
Exony Limited |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase agreement date | Aug. 06, 2014 |  |  |  |
Business acquisition, shares | 1,209,308 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Business acquisition, share price | $ 0.001 us-gaap_BusinessAcquisitionSharePrice / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Business acquisition, share value | 8,020,000 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Aggregate cash consideration | 8,130,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Business Acquisition Escrow Portion | 15.00%egan_BusinessAcquisitionEscrowPortion / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Number of Shareholders With Option Rights | 2 egan_NumberOfShareholdersWithOptionRights / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Acquisition cost |  |  | 844,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember | 844,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |
Other purchase consideration, value of stock issuable to two shareholders | 299,000 egan_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableToShareholders / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Other purchase consideration, shares of stock issuable to two shareholders | 45,119 egan_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedToShareholders / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember | 45,119 egan_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedToShareholders / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |
Other purchase consideration, cash paid to two shareholders | 289,000 egan_PaymentsToAcquireBusinessesCashPaidToShareholders / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Goodwill | 8,350,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |  |  |  |
Business combination, revenues recognized |  |  | 2,300,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember | 3,800,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |
Business combination, net loss |  |  | 1,200,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember | 1,900,000 us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember |
Exony Limited | Lease One |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Term of lease |  |  |  | 5 years |
Annual lease payment |  |  | 260,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember / us-gaap_LeaseArrangementTypeAxis = egan_LeaseOneMember | 260,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember / us-gaap_LeaseArrangementTypeAxis = egan_LeaseOneMember |
Exony Limited | Lease Two |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Term of lease |  |  |  | 2 years |
Annual lease payment |  |  | $ 91,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember / us-gaap_LeaseArrangementTypeAxis = egan_LeaseTwoMember | $ 91,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_BusinessAcquisitionAxis = egan_ExonyLimitedMember / us-gaap_LeaseArrangementTypeAxis = egan_LeaseTwoMember |

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