Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Schedule of Restricted Stock Units ("RSU") Activity (Detail)

v3.21.2
Stock-based Compensation - Schedule of Restricted Stock Units ("RSU") Activity (Detail) - Outstanding restricted stock units
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Number of Shares  
Beginning balance - Outstanding (shares) | shares 29,087
Options granted in period (shares) | shares 130,175
Vested (shares) | shares (7,928)
Forfeited (shares) | shares (2,200)
Ending balance - Outstanding (shares) | shares 149,134
Weighted Average Grant Date Fair Value Per Share  
Beginning balance - Outstanding (in dollars per share) | $ / shares $ 9.52
Granted (in dollars per share) | $ / shares 7.83
Vested (in dollars per share) | $ / shares 11.85
Forfeited (in dollars per share) | $ / shares 7.47
Ending balance - Outstanding (in dollars per share) | $ / shares $ 7.95
Vesting percentage 25.00%
Vesting period of options 4 years