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Stockholders' Equity - Restricted Stock and Restricted Stock Units (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Restricted Stock    
Restricted Stock and Restricted Stock Units    
Number of shares issued (shares) 612,950 156,184
Value of shares issued $ 877,700 $ 512,300
Weighted average estimated fair value $ 1.43 $ 3.28
Restricted Stock | Minimum    
Restricted Stock and Restricted Stock Units    
Vesting terms (in years) 1 year  
Restricted Stock | Maximum    
Restricted Stock and Restricted Stock Units    
Vesting terms (in years) 4 years  
Restricted Stock Units    
Restricted Stock and Restricted Stock Units    
Number of shares issued (shares) 458,245 325,853
Value of shares issued $ 728,600 $ 863,000.0
Weighted average estimated fair value $ 1.59 $ 2.65
Vesting terms (in years) 1 year