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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Income Taxes    
Period for which prior cumulative losses considered in assessing the realization of deferred tax assets 2 years  
Valuation allowance $ 2.4 $ 2.5
Net deferred tax assets $ 4.6 $ 4.6