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Summary of Business and Significant Accounting Policies - Summary of Stock-Based Compensation Included in Costs and Expenses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	$ 750us-gaap_ShareBasedCompensation	$ 394us-gaap_ShareBasedCompensation	$ 1,308us-gaap_ShareBasedCompensation	$ 740us-gaap_ShareBasedCompensation
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	174us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_CostOfProfessionalServicesMember	85us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_CostOfProfessionalServicesMember	303us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_CostOfProfessionalServicesMember	152us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_CostOfProfessionalServicesMember
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	217us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember	52us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember	410us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember	99us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	195us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_SalesMarketingAndAdministrativeExpenseMember	160us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_SalesMarketingAndAdministrativeExpenseMember	319us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_SalesMarketingAndAdministrativeExpenseMember	293us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = egan_SalesMarketingAndAdministrativeExpenseMember
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense	$ 164us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember	$ 97us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember	$ 276us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember	$ 196us-gaap_ShareBasedCompensation / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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