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Stockholders' Equity - Stock-based Compensation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 18, 2020
Jun. 21, 2017
Jul. 22, 2015
May 06, 2014
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Remaining weighted average life 2 years 8 months 12 days 3 years 1 month 6 days        
Unamortized stock compensation expense $ 0.3 $ 0.2        
Stock option            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 10 years          
Stock option | Non-Employee Director            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 1 year          
Minimum | Stock option            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 1 year          
Maximum | Stock option            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 4 years          
2020 Plan            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Number of shares authorized (in shares)     350,000      
Number of shares available for grant (in shares) 208,256          
2014 Plan            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Number of shares authorized (in shares)       260,000 120,000 120,000
2014 Plan | Minimum | Employee            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 3 years          
2014 Plan | Maximum | Employee            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Vesting period 4 years