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Stockholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
May 07, 2021
Apr. 26, 2021
Apr. 01, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Restricted Stock              
Stockholders' Equity              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period           245,224  
Compensation expense related to stock options       $ 37,000 $ 10,000 $ 47,000 $ 33,000
Unrecognized compensation expense       84,000   $ 84,000  
Weighted average period of recognition           1 year 9 months  
Restricted Stock | Non Management Directors              
Stockholders' Equity              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     50,000        
Award vesting period (in years)     2 years        
Restricted Stock | Non Management Directors | April 1, 2022              
Stockholders' Equity              
Percentage of options vested per tranche     50.00%        
Restricted Stock | Non Management Directors | April 1, 2023              
Stockholders' Equity              
Percentage of options vested per tranche     50.00%        
Restricted Stock | Consultant              
Stockholders' Equity              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   14,045          
Restricted Stock | Senior Management              
Stockholders' Equity              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 181,179            
Management Stock Bonus              
Stockholders' Equity              
Compensation expense related to stock options       354,000     291,000
Reduction to compensation expense           $ 8,000  
Warrant              
Stockholders' Equity              
Compensation expense related to stock options       $ 0 $ 0 $ 0 $ 0