Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details)

v2.4.1.9
Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details) (Earn-Out Liability, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Earn-Out Liability
 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning balance $ 1,710us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
/ us-gaap_FairValueByLiabilityClassAxis
= ent_EarnOutConsiderationMember
Change in value 0ent_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityChangeInValue
/ us-gaap_FairValueByLiabilityClassAxis
= ent_EarnOutConsiderationMember
Ending balance $ 1,710us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
/ us-gaap_FairValueByLiabilityClassAxis
= ent_EarnOutConsiderationMember