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Stock-based Compensation - Schedule of Restricted Stock Units ("RSU") Activity (Details) - Outstanding restricted stock units
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Number of Shares  
Beginning balance - Outstanding (shares) | shares 29,087
Options granted in period (shares) | shares 73,675
Vested (shares) | shares (5,788)
Ending balance - Outstanding (shares) | shares 96,974
Weighted Average Grant Date Fair Value Per Share  
Beginning balance - Outstanding (in dollars per share) | $ / shares $ 9.52
Granted (in dollars per share) | $ / shares 7.55
Vested (in dollars per share) | $ / shares 10.68
Ending balance - Outstanding (in dollars per share) | $ / shares $ 7.95
Vesting percentage 25.00%
Vesting period of options 4 years