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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Stockholders’ equity:    
Preferred Stock Series B-1, non-convertible, par value (in dollars per share) $ 0.0001glow_PreferredStockSeriesB1ParValue $ 0.0001glow_PreferredStockSeriesB1ParValue
Preferred Stock Series B-1, stated value $ 100,000glow_PreferredStockSeriesB1StatedValue $ 100,000glow_PreferredStockSeriesB1StatedValue
Preferred Stock Series B-1, shares authorized 100glow_PreferredStockSeriesB1SharesAuthorized 100glow_PreferredStockSeriesB1SharesAuthorized
Preferred Stock Series B-1, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred Stock Series B-1, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Preferred Stock Series B-1, liquidation value 0glow_PreferredStockSeriesB1LiquidationValue 0glow_PreferredStockSeriesB1LiquidationValue
Preferred stock Series A-2, convertible, par value (in dollars per share) $ 0.0001glow_PreferredStockSeriesA2ParValue $ 0.0001glow_PreferredStockSeriesA2ParValue
Preferred stock Series A-2, stated value 7,500glow_PreferredStockSeriesA2StatedValue 7,500glow_PreferredStockSeriesA2StatedValue
Preferred stock Series A-2, shares authorized 7,500glow_PreferredStockSeriesA2SharesAuthorized 7,500glow_PreferredStockSeriesA2SharesAuthorized
Preferred stock Series A-2, shares issued 53glow_PreferredstockSeriesA2Sharesissued 53glow_PreferredstockSeriesA2Sharesissued
Preferred stock Series A-2, shares outstanding 53glow_PreferredStockSeriesA2SharesOutstanding 53glow_PreferredStockSeriesA2SharesOutstanding
Preferred stock Series A-2, liquidation value $ 396,000glow_PreferredStockSeriesA2LiquidationValue $ 396,000glow_PreferredStockSeriesA2LiquidationValue
Common Stock, convertible, par value (in dollars per share) $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, shares authorized 150,000,000us-gaap_CommonStockSharesAuthorized 150,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, shares issued 35,950,732us-gaap_CommonStockSharesIssued 35,306,169us-gaap_CommonStockSharesIssued
Common Stock, shares outstanding 35,950,732us-gaap_CommonStockSharesOutstanding 35,306,169us-gaap_CommonStockSharesOutstanding
Treasury stock (in shares) 40,000us-gaap_TreasuryStockShares 0us-gaap_TreasuryStockShares