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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     $ 13,230,000us-gaap_Goodwill $ 13,230,000us-gaap_Goodwill $ 4,880,000us-gaap_Goodwill
Exony Limited          
Business Acquisition [Line Items]          
Purchase agreement date Aug. 06, 2014        
Business acquisition, shares 1,209,308us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
       
Business acquisition, share price $ 0.001us-gaap_BusinessAcquisitionSharePrice
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
       
Business acquisition, share value 8,020,000us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
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= egan_ExonyLimitedMember
       
Aggregate cash consideration 8,130,000us-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 2egan_NumberOfShareholdersWithOptionRights
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
       
Acquisition cost     844,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
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844,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
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Other purchase consideration, value of stock issuable to two shareholders 299,000egan_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableToShareholders
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= egan_ExonyLimitedMember
       
Other purchase consideration, shares of stock issuable to two shareholders 45,119egan_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedToShareholders
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
45,119egan_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssuedToShareholders
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= egan_ExonyLimitedMember
     
Other purchase consideration, cash paid to two shareholders 289,000egan_PaymentsToAcquireBusinessesCashPaidToShareholders
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= egan_ExonyLimitedMember
       
Goodwill 8,350,000us-gaap_Goodwill
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= egan_ExonyLimitedMember
       
Business combination, revenues recognized     2,300,000us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized
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= egan_ExonyLimitedMember
3,800,000us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
 
Business combination, net loss     1,200,000us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses
/ us-gaap_BusinessAcquisitionAxis
= egan_ExonyLimitedMember
1,900,000us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses
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= egan_ExonyLimitedMember
 
Exony Limited | Lease One          
Business Acquisition [Line Items]          
Term of lease       5 years  
Annual lease payment     260,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue
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260,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue
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= egan_LeaseOneMember
 
Exony Limited | Lease Two          
Business Acquisition [Line Items]          
Term of lease       2 years  
Annual lease payment     $ 91,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue
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= egan_ExonyLimitedMember
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= egan_LeaseTwoMember
$ 91,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue
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= egan_ExonyLimitedMember
/ us-gaap_LeaseArrangementTypeAxis
= egan_LeaseTwoMember