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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts - accounts receivable $ 643 $ 463
Software accumulated amortization $ 2,732 $ 2,651
Cumulative preferred stock, percentage 10.00% 10.00%
Preferred stock series A, par value per share $ 0.005 $ 0.005
Preferred stock series A, liquidation preference $ 156 $ 156
Preferred stock series A, shares authorized 156 156
Preferred stock series A, shares issued 156 156
Preferred stock series A, shares outstanding 156 156
Common stock, par value $ 0.005 $ 0.005
Common stock, shares authorized 15,000 15,000
Common stock, shares issued 2,521 2,521
Common stock, shares outstanding 2,521 2,521
Treasury stock, shares 10 10