Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Earn-out and Equipment Purchase Commitments and Legal Matters (Details)

v2.4.1.9
Commitments and Contingencies Earn-out and Equipment Purchase Commitments and Legal Matters (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Other Commitments [Line Items]    
Purchase obligation $ 19,000,000us-gaap_PurchaseObligation  
Earn-Out Commitment    
Other Commitments [Line Items]    
Other Commitment $ 1,700,000us-gaap_OtherCommitment
/ us-gaap_OtherCommitmentsAxis
= ent_EarnOutCommitmentMember
$ 1,200,000us-gaap_OtherCommitment
/ us-gaap_OtherCommitmentsAxis
= ent_EarnOutCommitmentMember