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Stock-Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 81,000 $ 96,000  
Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares originally reserved (in shares)     5,600,676
Number of shares available for grant (in shares) 2,267,565    
Incentive Plan | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 10 years    
Award service period (in years) 4 years    
Unrecognized compensation costs $ 0    
Incentive Plan | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 277,000    
Unrecognized compensation cost, period of recognition (in years) 1 year 5 months 1 day    
Incentive Plan | Restricted Stock Units (RSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 2 years    
Incentive Plan | Restricted Stock Units (RSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 4 years    
Incentive Plan | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of stock vested $ 82,000    
Incentive Plan | Second Anniversary of Award Date | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options vesting 50.00%    
Incentive Plan | Third Anniversary of Award Date | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options vesting 25.00%    
Incentive Plan | Fourth Anniversary of Award Date | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options vesting 25.00%    
2019 Executive Performance RSU Award Agreement | Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Required operating income $ 1,000,000    
Period before vesting begins 1 year    
Deferred Plan | Deferred Compensation      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 0 $ 0