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Commitments, Contingencies and Other Commitments, Contingencies and Other (Details 3) (Details) - shares
13 Months Ended 24 Months Ended 60 Months Ended
Mar. 01, 2018
Jan. 03, 2017
Apr. 30, 2018
Dec. 31, 2016
Dec. 31, 2020
Executive B [Member]          
Loss Contingencies [Line Items]          
Deferred Compensation Arrangement with Individual, Shares Issued       15,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years        
Executive C [Member]          
Loss Contingencies [Line Items]          
Deferred Compensation Arrangement with Individual, Shares Issued   28,169 20,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years      
Executive D [Member]          
Loss Contingencies [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         5 years