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Accrued Expenses and Other Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accrued Expenses, Current [Abstract]    
Accrued compensation $ 381us-gaap_EmployeeRelatedLiabilitiesCurrent $ 271us-gaap_EmployeeRelatedLiabilitiesCurrent
Accrued severance costs 22glow_AccruedSeveranceCosts 20glow_AccruedSeveranceCosts
Accrued communication costs 200glow_AccruedCommunicationCostsCurrent 272glow_AccruedCommunicationCostsCurrent
Accrued professional fees 88us-gaap_AccruedProfessionalFeesCurrent 146us-gaap_AccruedProfessionalFeesCurrent
Accrued interest 119us-gaap_InterestPayableCurrent 143us-gaap_InterestPayableCurrent
Other accrued expenses 254us-gaap_OtherAccruedLiabilitiesCurrent 382us-gaap_OtherAccruedLiabilitiesCurrent
Deferred rent expense 91us-gaap_DeferredRentCredit 75us-gaap_DeferredRentCredit
Deferred revenue 128us-gaap_DeferredRevenue 76us-gaap_DeferredRevenue
Customer deposits 210us-gaap_CustomerDepositsNoncurrent 191us-gaap_CustomerDepositsNoncurrent
Accrued expenses and other liabilities $ 1,493us-gaap_AccruedLiabilitiesCurrent $ 1,576us-gaap_AccruedLiabilitiesCurrent