Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plans - Employee Stock Purchase Plan - Additional Information (Detail)

v3.21.1
Stock-Based Compensation Plans - Employee Stock Purchase Plan - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2021
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Common stock shares available for issuance 4,757,955
Unrecognized stock-based compensation expense | $ $ 31,378,000
Unrecognized stock-based compensation expenses recognition period 3 years 8 months 19 days
Employee Stock Purchase Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
ESPP offering period description The offering periods generally start on the first trading day on or after May 15 and November 15 of each year.
Length of purchase intervals 6 months
ESPP discount rate 10.00%
Initial Common stock reserved 366,667
Common stock shares available for issuance 176,877
Unrecognized stock-based compensation expense | $ $ 24,000
Unrecognized stock-based compensation expenses recognition period 1 month 13 days
Employee Stock Purchase Plan - Annual Available for Issuance Share Increase [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Common stock available for future issuance authorized annual share increase 366,667
Common stock available for future issuance authorized annual percentage increase 1.00%
ESPP description The ESPP provides for annual increases in the number of shares available for issuance under the ESPP, equal to the least of (i) 366,667 shares, (ii) 1% of the outstanding shares on such date, or (iii) an amount determined by the compensation committee of the board of directors.