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Stockholders' Equity - Stock Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Apr. 26, 2022
Apr. 20, 2022
Aug. 13, 2021
Jul. 01, 2021
Apr. 01, 2021
Mar. 15, 2021
Dec. 31, 2022
Dec. 31, 2021
Other disclosures                
Compensation expense             $ 720 $ 720
Operating cost             620  
Other income             $ 100  
Authorized number of shares             51,000,000  
Employee                
Other disclosures                
Compensation expense             $ 410 550
Non Management Directors                
Other disclosures                
Compensation expense             $ 310 $ 170
Stock options                
Number of Options                
Outstanding, beginning balance (in shares)             5,630,970  
Granted (in shares)             605,850  
Canceled (in shares)             0  
Exercised (in shares)             0  
Expired/Forfeited (in shares)             (622,510)  
Outstanding, ending balance (in shares)             5,614,310 5,630,970
Exercisable (in shares)             1,916,810  
Weighted Average Exercise Price                
Outstanding, beginning balance (in dollars per share)             $ 2.25  
Granted (in dollars per share)             1.61  
Canceled (in dollars per share)             0  
Exercised (in dollars per share)             0  
Expired/Forfeited (in dollars per share)             2.81  
Outstanding, ending balance (in dollars per share)             2.12 $ 2.25
Exercisable (in dollars per share)             $ 2.89  
Other disclosures                
Outstanding Weighted Average Remaining Contractual Life (in Years)             4 years 9 months 3 days 5 years 5 months 15 days
Exercisable Weighted Average Remaining Contractual Life (in Years)             1 year 9 months  
Vested (in shares)             771,684  
Compensation expense             $ 500 $ 300
Unrecognized compensation expense               $ 100
Weighted average period of recognition               1 year 1 month 13 days
Stock options | Employee                
Number of Options                
Granted (in shares)   380,850 10,000     365,390    
Weighted Average Exercise Price                
Granted (in dollars per share)   $ 1.62 $ 2.00     $ 1.86    
Stock options | Non Management Directors                
Number of Options                
Granted (in shares)         125,000      
Weighted Average Exercise Price                
Granted (in dollars per share)         $ 1.93      
Stock options | Management                
Number of Options                
Granted (in shares)   125,000   20,000        
Weighted Average Exercise Price                
Granted (in dollars per share)   $ 1.62   $ 2.76        
Other disclosures                
Vesting percentage per year   50.00%            
Stock options | Consultant                
Number of Options                
Granted (in shares) 100,000              
Weighted Average Exercise Price                
Granted (in dollars per share) $ 1.58              
Stock options | Five year expiration                
Stockholders' Equity                
Expiration period               5 years
Stock options | Seven year expiration                
Stockholders' Equity                
Expiration period               7 years
Stock options | Ten year expiration                
Stockholders' Equity                
Expiration period               10 years