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Stockholders' Equity - Warrants (Details) - Warrant - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Number of Other than Options          
Outstanding and exercisable, beginning balance (in shares)     579,815    
Granted (in shares)     0    
Canceled (in shares)     0    
Exercised (in dollars per share)     0    
Expired/Forfeited (in shares)     0    
Outstanding and exercisable, ending balance (in shares) 579,815   579,815   579,815
Weighted Average Exercise Price          
Outstanding, beginning balance (in dollars per share)     $ 4.63    
Granted (in dollars per share)     0.00    
Canceled (in dollars per share)     0.00    
Exercised (in dollars per share)     0.00    
Expired/Forfeited (in dollars per share)     0.00    
Outstanding, ending balance (in dollars per share) $ 4.63   $ 4.63   $ 4.63
Weighted Average Remaining Contractual Life (in Years), Outstanding and exercisable     1 year 6 months 22 days   2 years 3 months 26 days
Aggregate Intrinsic Value, Outstanding and exercisable $ 0   $ 0   $ 0
Other disclosures          
Compensation expense $ 0 $ 0 $ 0 $ 0  
Five year expiration          
Stockholders' Equity          
Expiration period     5 years    
Ten year expiration          
Stockholders' Equity          
Expiration period     10 years