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Income Taxes - Income Taxes (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Current taxes - Federal $ 903,000 $ 204,000
Current taxes - State 74,000 37,000
Deferred taxes - Federal (4,000) 51,000
Deferred taxes - State 33,000 6,000
Income tax expense $ 1,006,000 298,000
Accounting Standards Update 2015 -17 - Balance Sheet Classification of Deferred Taxes | Adjustments for New Accounting Principle, Early Adoption    
Current deferred tax assets   (52,000)
Noncurrent deferred income tax liabilities   $ 52,000