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Stock-Based Compensation (Details) - USD ($)
12 Months Ended
Feb. 23, 2015
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares of common stock that may be delivered (in shares)         6,000,000
Number of shares available for grant (in shares)   2,129,200      
Compensation expense   $ 0 $ 0 $ 18,900  
Options granted (in shares)   0      
Options exercised (in shares)   0      
Options forfeited (in shares)   0      
Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 12,000        
Unrecognized share based compensation   $ 0      
Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized share based compensation   $ 0