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Stock-based Compensation - Summary of Unvested Restricted Stock Units (Details) - Restricted Stock Units (RSUs)
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Number of Shares Outstanding  
Outstanding at beginning of period (in shares) | shares 256,000
Granted (in shares) | shares 40,000
Vested (in shares) | shares (5,000)
Forfeited (in shares) | shares (51,250)
Outstanding at end of period (in shares) | shares 239,750
Weighted Average Grant Date Fair Value  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 10.00
Granted (in dollars per share) | $ / shares 17.98
Vested (in dollars per share) | $ / shares 18.56
Forfeited (in dollars per share) | $ / shares 11.03
Outstanding at end of period (in dollars per share) | $ / shares $ 11.11