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Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Income tax expense (benefit) $ (6) $ 6  
Income Taxes (Textual) [Abstract]      
Unrecognized tax benefits 9,300   $ 9,200
Unrecognized tax benefits that would impact effective tax rate 355   364
Accrued for interest and penalties 48   $ 62
Reduction in gross unrecognized tax benefits $ 14