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Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Basic and Diluted Loss per Share (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Numerator:        
Loss from continuing operations $ (1,773) $ (3,177) $ (9,409) $ (9,070)
Loss from discontinued operations 0 0 0 (12)
Net loss $ (1,773) $ (3,177) $ (9,409) $ (9,082)
Denominator:        
Basic weighted average common shares outstanding (in shares) 11,856 11,690 11,789 11,666
Potential common shares from equity awards and warrants (in shares) 0 0 0 0
Diluted weighted average shares (in shares) 11,856 11,690 11,789 11,666