Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.7.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 60 Months Ended
Aug. 31, 2011
Mar. 31, 2017
Dec. 31, 2011
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
May 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of options outstanding       1,147,728   922,930  
Aggregate intrinsic value of options outstanding       $ 0      
Intrinsic value of all options exercised       0      
Net cash proceeds from exercise of stock options       0 $ 0    
Share based compensation expense before income taxes       246,000 450,000    
Share based compensation expense after income taxes       160,000 292,000    
Unrecognized compensation expense for awards       $ 616,000      
Recognition period for unrecognized compensation expense       2 years 3 months 18 days      
Excess tax benefits from the exercise of stock options and issuance of stock       $ 0 $ (50,000)    
2011 Executive Incentive Compensation Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of awards authorized             2,000,000
Shares issued under Plan       159,388      
Number of options outstanding       1,302,763      
Awards eligible for grant       537,849      
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       51,000      
1992 Stock Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares available       10,230      
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       65,347      
Key Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred stock awards granted   100,239          
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       259,686      
Award expiration period       7 years