Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 4 Months Ended 6 Months Ended 72 Months Ended
Aug. 31, 2011
Dec. 31, 2011
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
May 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options outstanding     1,357,272   1,172,659  
Aggregate intrinsic value of options outstanding     $ 38,000      
Intrinsic value of all options exercised     0      
Net cash proceeds from exercise of stock options     0 $ 0    
Share based compensation expense before income taxes     110,000 246,000    
Share based compensation expense after income taxes     87,000 $ 160,000    
Unrecognized compensation expense for awards     $ 237,000      
Recognition period for unrecognized compensation expense     2 years 7 months 6 days      
2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards authorized           2,500,000
Shares issued under Plan     208,555      
Number of options outstanding     1,635,666      
Awards eligible for grant     655,779      
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%      
Stock Option Plan For Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options granted 0 0 0   0  
Award expiration period     10 years      
Number of options outstanding     36,000      
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%      
Shares available     39,380      
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      
Key Executive Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options granted     218,665      
Award expiration period     7 years