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Employee Benefits - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Defined Contribution Plan [Line Items]    
Percent of employee contribution match 4.00%  
Contribution rate per dollar 25.00%  
Contribution plan amounts $ 234 $ 199
Employer contribution amount 620 706
Stock-based compensation expense 498 323
Unrecognized compensation expense 148 363
Accrued tax benefit for non-qualified stock options 11 11
Intrinsic value of stock options $ 21 1,400
Restricted Stock    
Defined Contribution Plan [Line Items]    
Award vesting period 5 years  
Unrecognized compensation expense $ 1,800 $ 1,400
Stock Options    
Defined Contribution Plan [Line Items]    
Number of shares available with exercise stock options (in shares) 19,723 13,359
Restricted Stock Awards or Units    
Defined Contribution Plan [Line Items]    
Number of shares available with exercise stock options (in shares) 22,144 60,124
Reduction of shares over threshold (in shares) 3