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Stockholders' Equity - Warrants (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Other disclosures          
Compensation expense $ 580,000 $ 430,000 $ 610,000 $ 590,000  
Warrant          
Number of Other than Options          
Outstanding and exercisable, beginning balance (in shares)     116,065    
Granted (in shares)     0    
Canceled (in shares)     0    
Exercised (in shares)     0    
Expired/Forfeited (in shares)     0    
Outstanding and exercisable, ending balance (in shares) 116,065   116,065   116,065
Weighted Average Exercise Price          
Outstanding and exercisable, beginning balance (in dollars per share)     $ 3.15    
Granted (in dollars per share)     0    
Canceled (in dollars per share)     0    
Exercised (in dollars per share)     0    
Expired/Forfeited (in dollars per share)     0    
Outstanding and exercisable, ending balance (in dollars per share) $ 3.15   $ 3.15   $ 3.15
Weighted Average Remaining Contractual Life (in Years), Outstanding and exercisable     2 years 29 days   2 years 6 months 25 days
Aggregate Intrinsic Value, Outstanding and exercisable $ 0   $ 0   $ 0
Other disclosures          
Compensation expense $ 0 $ 0 $ 0 $ 0