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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Total | Series B-1 Preferred Stock [Member] | Series A-2 Preferred Stock [Member] | Common Stock [Member] | Additional Paid In Capital [Member] | Accumulated Deficit [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance, Value at Dec. 31, 2012 | $ 13,003 us-gaap_StockholdersEquity | $ 10,000 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 167 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | $ 3 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 166,481 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (163,648)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Beginning Balance, Shares at Dec. 31, 2012 |  | 100 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 53 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | 28,887,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 0 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net loss | (4,211)us-gaap_NetIncomeLoss |  |  |  |  | (4,211)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Stock-based compensation | 1,038 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  | 1,038 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Forfeiture of restricted stock, net of issuance, Shares |  |  |  | (462,000)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Forfeiture of restricted stock, net of issuance, Value | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures |  |  |  |  |  |
Stock issued in connection with debt amendment, Shares |  |  |  | 100,000 glow_SharesIssuedDuringPeriodSharesAmendmentofDebtInstrument / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued in connection with debt amendment | 148 glow_SharesIssuedDuringPeriodValueAmendmentofDebtInstrument |  |  |  | 148 glow_SharesIssuedDuringPeriodValueAmendmentofDebtInstrument / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Preferred stock exchange, Shares |  | (100)glow_StockIssuedDuringPeriodSharesConversionofConvertibleSecuritiesIncludingFinancialServices / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  | 6,767,000 glow_StockIssuedDuringPeriodSharesConversionofConvertibleSecuritiesIncludingFinancialServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Preferred stock exchange, Value | (289)glow_StockIssuedDuringPeriodValueConversionofConvertibleSecuritiesIncludingFinancialServices | (10,000)glow_StockIssuedDuringPeriodValueConversionofConvertibleSecuritiesIncludingFinancialServices / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  | 1 glow_StockIssuedDuringPeriodValueConversionofConvertibleSecuritiesIncludingFinancialServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 9,710 glow_StockIssuedDuringPeriodValueConversionofConvertibleSecuritiesIncludingFinancialServices / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Preferred stock dividends | (20)us-gaap_DividendsPreferredStockStock |  |  |  | (20)us-gaap_DividendsPreferredStockStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Options exercised, Shares |  |  |  | 14,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Options exercised, Value | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  |  |  |  |
Ending Balance, Value at Dec. 31, 2013 | 9,669 us-gaap_StockholdersEquity | 0 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 167 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | 4 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 177,357 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (167,859)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance, Shares at Dec. 31, 2013 |  | 0 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 53 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | 35,306,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 0 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net loss | (2,755)us-gaap_NetIncomeLoss |  |  |  |  | (2,755)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Stock-based compensation | 563 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  | 563 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Issuance of restricted stock to settle accrued 2013 bonuses, Shares |  |  |  | 123,000 glow_StockIssuedDuringPeriodSharesSettlementofLiabilities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of restricted stock to settle accrued 2013 bonuses, Value | 204 glow_StockIssuedDuringPeriodValueSettlementofLiabilities |  |  |  | 204 glow_StockIssuedDuringPeriodValueSettlementofLiabilities / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Common stock issued in connection with debt amendment | 0 glow_SharesIssuedDuringPeriodValueAmendmentofDebtInstrument |  |  |  |  |  |
Issuance of restricted stock, Shares |  |  |  | 400,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of restricted stock, Value | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross |  |  |  |  |  |
Forfeited restricted stock, Shares |  |  |  | (224,000)us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Forfeited restricted stock, Value | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures |  |  |  |  |  |
Cost of preferred stock exchange | (5)us-gaap_DividendsPreferredStock |  |  |  | (5)us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Preferred stock dividends | (20)us-gaap_DividendsPreferredStockStock |  |  |  | (20)us-gaap_DividendsPreferredStockStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Options exercised, Shares | 50,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |  |  | 20,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Options exercised, Value | 0 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  |  |  |  |
Repurchase of common stock, Shares |  |  |  |  |  |  | 40,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Repurchase of common stock, Value | (66)us-gaap_TreasuryStockValueAcquiredCostMethod |  |  |  |  |  | (66)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Issuance of common stock under an at-the-market sales agreement, net of expenses, Shares |  |  |  | 326,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Issuance of common stock under an at-the-market sales agreement, net of expenses, Value | 377 us-gaap_StockIssuedDuringPeriodValueNewIssues |  |  |  | 377 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Ending Balance, Value at Dec. 31, 2014 | $ 7,967 us-gaap_StockholdersEquity | $ 0 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 167 us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | $ 4 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 178,476 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (170,614)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (66)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance, Shares at Dec. 31, 2014 |  | 0 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 53 us-gaap_SharesIssued / us-gaap_StatementClassOfStockAxis = glow_SeriesA2PreferredStockMember | 35,951,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 40,000 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember

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