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Stock Based Compensation - Narrative (Details) - USD ($)
12 Months Ended
Oct. 01, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 19, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options outstanding (in shares)   107,500 215,345   118,003
Exercise period 1 year        
Intrinsic value of exercisable options   $ 0 $ 0    
Intrinsic value of nonvested options   0 0    
Tax obligations relating to the vesting of shares   16,000 0    
Stock-based compensation, tax benefit   0 0    
Compensation costs capitalized as part of the cost of an asset   0 $ 0    
Unrecognized stock-based compensation expense for stock options   0      
Number of options granted (in shares)     107,845    
Intrinsic value of options exercised   $ 0 $ 0    
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of options granted (in shares)   0 0    
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option compensation expense   $ 0 $ 3,000    
Unvested restricted shares outstanding (in shares)   627 627   11,320
Unrecognized stock-based compensation expense for other than options   $ 0      
Period of recognition   5 years      
Vesting period   10 years      
Forfeited, restricted shares (in shares)     9,321    
RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option compensation expense   $ 6,000 $ 74,000    
Unvested restricted shares outstanding (in shares)   0 23,334   503,518
Stock-based compensation arrangement, vested in period, remain outstanding (in shares)   28,904 28,904    
Shares withheld and repurchased to satisfy tax obligations (in shares)   7,998      
Tax obligations relating to the vesting of shares   $ 16,000      
Unrecognized stock-based compensation expense for other than options   $ 0      
Forfeited, restricted shares (in shares)     421,158    
Granted, restricted shares (in shares)     55,479    
Prior Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)       421,000  
Prior Plan | RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)   28,904      
2019 Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)   3,013,500      
Awards granted in period (in shares)   7,500 0    
Stock option compensation expense   $ 35,000      
2019 Equity Incentive Plan | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)     2,600,000    
2007 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)   0      
2007 Stock Incentive Plan | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options outstanding (in shares)   107,500      
2007 Stock Incentive Plan | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested restricted shares outstanding (in shares)   627      
Nonemployee | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares) 107,845        
Stock option compensation expense   $ 0 $ 0    
Weighted average price of shares (in dollars per share) $ 4.92        
Exercise period 1 year        
Series D Preferred Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Forfeited, restricted shares (in shares)   28,618 1,725    
Series D Preferred Stock | Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option compensation expense   $ 158,000 $ 33,000    
Unvested restricted shares outstanding (in shares)   18,548      
Unrecognized stock-based compensation expense for other than options   $ 38,000      
Issuance of restricted stock (in shares) 49,967 49,967      
Vesting period 2 years 2 years      
Forfeited, restricted shares (in shares)   29,694 1,725