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Related Party Transactions (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Director Affiliated Entity [Member] | ABM Industries, Inc. (ABM) [Member]    
Related Party Transaction [Line Items]    
Revenue, related parties $ 33,000us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= glow_AbmIndustriesIncMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_DirectorAffiliatedEntityMember
$ 33,000us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= glow_AbmIndustriesIncMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_DirectorAffiliatedEntityMember
Accounts receivable, related parties, current 11,000us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= glow_AbmIndustriesIncMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_DirectorAffiliatedEntityMember
 
Director [Member]    
Related Party Transaction [Line Items]    
Related party transaction, amounts of transaction, monthly 12,500glow_RelatedPartyTransactionAmountsOfTransactionMonthly
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
 
Related party transaction, amounts of transaction $ 0us-gaap_RelatedPartyTransactionAmountsOfTransaction
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
$ 37,500us-gaap_RelatedPartyTransactionAmountsOfTransaction
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_DirectorMember
President and CEO [Member] | Promissory Note [Member] | Promissory Note with Stockholder Representative [Member]    
Related Party Transaction [Line Items]    
Interest in note payable (percent) 27.00%glow_DebtInstrumentInterestinNotePayableOwnershipPercentage
/ us-gaap_DebtInstrumentAxis
= glow_PromissoryNoteWithStockholderRepresentativeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_PresidentandCEOMember
 
GP Investment Holdings, LLC [Member]    
Related Party Transaction [Line Items]    
Common shares owned by stockholder 7,711,517glow_CommonSharesOwnedStockholder
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_GPInvestmentHoldingsLLCMember
 
Common shares owned by stockholder (percent) 22.00%glow_CommonSharesOwnedStockholderPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= glow_GPInvestmentHoldingsLLCMember