Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Narrative) (Details)

v3.10.0.1
Stock Compensation (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended 96 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2016
May 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options outstanding   1,380,492 1,172,659 1,380,492 922,930  
Unrecognized compensation expense related to stock options   $ 164,000   $ 164,000    
Aggregate intrinsic value of options outstanding   0   $ 0    
Intrinsic value of all options exercised   $ 0 $ 0      
Number of options exercised   0 0      
Share based compensation expense before income taxes   $ 191,000 $ 417,000      
Share based compensation expense after income taxes   151,000 271,000      
Excess tax benefits from exercise of stock options   $ 0 $ 0      
Shares of ESOP allocated to accounts of eligible employees   784,463   784,463    
2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards authorized           2,500,000
Number of options granted   278,665        
Award expiration period   7 years        
Shares issued under Plan   208,555   208,555    
Number of options outstanding   1,614,558   1,614,558    
Awards eligible for grant   676,887   676,887    
2011 Executive Incentive Compensation Plan [Member] | Share-based Compensation Award, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage   25.00%        
ESOP [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period   6 years        
Initial award vesting period   2 years        
Requisite service period   1 year        
ESOP [Member] | Share-based Compensation Award, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage   20.00%        
2017 ESOP [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
ESOP contributions   $ 256,462        
2017 ESOP [Member] | Scenario, Forecast [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Issuance of common stock to Employee Stock Ownership Plan, Shares 126,336          
2016 ESOP [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
ESOP contributions   $ 425,890        
Issuance of common stock to Employee Stock Ownership Plan, Shares   119,632        
Non-Employee Directors [Member] | Stock Option Plan For Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options granted       0    
Award expiration period   10 years        
Number of options outstanding   36,000   36,000    
Number of shares automatically granted to each non-employee director   3,000        
Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Recognition period for unrecognized compensation expense   1 year 10 months 24 days        
Performance Units [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense for awards   $ 2,000   $ 2,000    
Recognition period for unrecognized compensation expense   2 months 12 days        
Employee Stock Purchase Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of price of common stock at which employees are able to acquire   85.00%        
Awards eligible for grant   23,591   23,591    
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense for awards   $ 0   $ 0    
2019 to 2020 [Member] | Performance Units [Member] | Key Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred stock awards granted   163,002