Quarterly report pursuant to Section 13 or 15(d)

Stock Plan and Stock-Based Compensation - Additional Information (Detail)

v3.20.1
Stock Plan and Stock-Based Compensation - Additional Information (Detail) - 2013 Equity Incentive Plan [Member]
3 Months Ended
Mar. 31, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares available for grant 2,925,332
Increase in shares reserved for issuance 0