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Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Income Taxes          
Income tax expense (benefit) $ (185,000) $ 164,000 $ (417,000) $ 239,000  
Income tax rate, percentage 68.00% 39.60% 50.50% 40.90%  
Unrecognized tax benefits $ 528,000   $ 528,000   $ 528,000
Unrecognized tax benefits, if recognized, that would affect the effective income tax rates of future periods $ 528,000   $ 528,000