Contract expiration date.

No definition available.

Name:	egov_ContractExpirationDate
Namespace Prefix:	egov_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Contract Renewal Options

+ References

No definition available.

+ Details

Name:	egov_ContractRenewalOptions
Namespace Prefix:	egov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	egov_ContractsLineItems
Namespace Prefix:	egov_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of contract.

+ References

No definition available.

+ Details

Name:	egov_ContractTerm
Namespace Prefix:	egov_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of contracts under which the Company provides outsourced state portal services that can be terminated by the other party without cause on a specified period of notice.

+ References

No definition available.

+ Details

Name:	egov_NumberOfContractsThatCanBeTerminatedByOtherPartyWithoutCauseOnPeriodOfNotice
Namespace Prefix:	egov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of contracts under which the Company provides outsourced portal services or software development and services that have expiration dates within the 12-month period following the most recent Balance Sheet date of the filing.

+ References

No definition available.

+ Details

Name:	egov_NumberOfContractsWithExpirationDateWithinTwelveMonthPeriod
Namespace Prefix:	egov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of federal agencies the Company currently has contracts with to provide outsourced services.

+ References

No definition available.

+ Details

Name:	egov_NumberOfFederalAgenciesWithContractsToProvideOutsourcedServices
Namespace Prefix:	egov_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Option For Extending Term Of Agreement

+ References

No definition available.

+ Details

Name:	egov_OptionForExtendingTermOfAgreement
Namespace Prefix:	egov_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenue from NIC subsidiaries operating state and local government portals on an outsourced basis (primarily transaction-based information access fees and filings), and revenue from service contracts to provide portal consulting, application development and management services to state and local governments.

+ References

No definition available.

+ Details

Name:	egov_PortalRevenues
Namespace Prefix:	egov_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenues generated from contracts under which the Company provides outsourced portal services or software development and services that have expiration dates within the 12-month period following the most recent Balance Sheet date of the filing as a percentage of total revenues.

+ References

No definition available.

+ Details

Name:	egov_RevenueFromContractsWithExpirationDateWithinTwelveMonthPeriodAsPercentageOfRevenues
Namespace Prefix:	egov_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=egov_DelawareInteractiveLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=egov_NewMexicoInteractiveLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=egov_NICUSAAZDivisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=egov_USDepartmentOfTransportationFederalMotorCarrierSafetyAdministrationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_AL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_ID
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_MT
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_NJ
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_OK
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorCustomersAxis=stpr_TN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=egov_OutsourcedPortalsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Outsourced Government Contracts - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015 Contract Customer	Mar. 31, 2014	Sep. 30, 2014 Option	Jun. 30, 2015 RenewalOptions
Contracts [Line Items]
Performance bond commitments	$ 6,600,000
Number of federal agencies the Company currently has contracts with to provide outsourced services	1
Number of outsourced portal services or software development and services contracts with expiration date within a 12-month period	10
Percentage of total consolidated revenues related to contracts with expiration dates within a 12-month period	24.00%
Revenues	70,359,000us-gaap_Revenues	65,397,000us-gaap_Revenues
Portal revenues	65,914,000egov_PortalRevenues	61,482,000egov_PortalRevenues
Outsourced Portals
Contracts [Line Items]
Number of portal outsourcing contracts that can be terminated by the other party without cause on period of notice	17
Outsourced Portals \| Consolidated Revenues \| Customer Concentration Risk
Contracts [Line Items]
Concentration risk percentage	62.00%
New Mexico Interactive, LLC
Contracts [Line Items]
Contract period			2 years
Contract renewal option			2
Option for the government to extend the contract			1 year
NICUSA, AZ Division
Contracts [Line Items]
Contract Expiration Date	Mar. 26, 2014
NICUSA, AZ Division \| Consolidated Revenues
Contracts [Line Items]
Revenues		800,000
Delaware Interactive, LLC
Contracts [Line Items]
Portal revenues	$ 600,000	$ 600,000
Montana \| Extended Term
Contracts [Line Items]
Contract period	2 years
IDAHO \| Extended Term
Contracts [Line Items]
Contract period	2 years
State of Alabama \| Extended Term
Contracts [Line Items]
Contract period	1 year
TENNESSEE \| Extended Term
Contracts [Line Items]
Contract period	1 year
State of Oklahoma \| Scenario, Forecast
Contracts [Line Items]
Contract period				1 year
Contract renewal option				4
State of Oklahoma \| Scenario, Forecast \| Renewal Term
Contracts [Line Items]
Contract period				1 year
State of New Jersey \| Scenario, Forecast
Contracts [Line Items]
Contract period				5 years
Contract renewal option				2
State of New Jersey \| Scenario, Forecast \| Renewal Term
Contracts [Line Items]
Contract period				1 year
US Department of Transportation, Federal Motor Carrier Safety Administration
Contracts [Line Items]
Contract Expiration Date	Aug. 16, 2015