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The Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Categories
Mar. 31, 2014
Dec. 31, 2014
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]      
Number of business channels 2egov_NumberOfBusinessChannels    
Number of revenue and cost categories 2egov_NumberOfRevenueAndCostCategory    
Selling & administrative $ 10,538,000us-gaap_SellingGeneralAndAdministrativeExpense $ 9,208,000us-gaap_SellingGeneralAndAdministrativeExpense  
Allowance for doubtful accounts 500,000us-gaap_AllowanceForDoubtfulAccountsReceivable   500,000us-gaap_AllowanceForDoubtfulAccountsReceivable
Unvested service-based restricted stock awards included in the calculation of earnings per share 0.7us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights 0.7us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights  
Reclassification Adjustment      
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]      
Selling & administrative   (1,100,000)us-gaap_SellingGeneralAndAdministrativeExpense
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioAdjustmentMember
 
Deposits Assets      
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]      
Cash subject to FDIC insurance 10,400,000us-gaap_CashFDICInsuredAmount
/ egov_CashAxis
= egov_DepositsAssetsMember
   
Cash not subject to FDIC insurance 81,700,000us-gaap_CashUninsuredAmount
/ egov_CashAxis
= egov_DepositsAssetsMember
   
Deposits Assets | Maximum      
Organization and Summary of Significant Accounting Policies Disclosure [Line Items]      
FDIC deposit insurance coverage per depositor $ 250,000egov_FdicInsuranceCoveragePerDepositor
/ egov_CashAxis
= egov_DepositsAssetsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember