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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Allowance for doubtful accounts $ 148 $ 152
Preferred stock, shares authorized 7,000,000 7,000,000
Preferred stock, shares issued 5,446,978 5,446,978
Preferred stock, shares outstanding 5,446,978 5,446,978
Common stock, par value (in dollars per share) $ 0.00025 $ 0.00025
Common stock, shares authorized 8,040,000 8,040,000
Common stock, shares issued 2,487,589 2,421,599
Common stock, shares outstanding 2,487,589 2,421,599
Series A Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.00025 $ 0.00025
Preferred stock, cumulative preferred dividends $ 8,874 $ 7,439
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 1,000,000 1,000,000
Preferred stock, shares outstanding 1,000,000 1,000,000
Series B Preferred Stock    
Preferred stock, par value (in dollars per share) $ 0.00025 $ 0.00025
Preferred stock, cumulative preferred dividends $ 11,793 $ 8,864
Preferred stock, shares authorized 6,000,000 6,000,000
Preferred stock, shares issued 4,446,978 4,446,978
Preferred stock, shares outstanding 4,446,978 4,446,978