Shareholders' Equity - Class A Common Shares Reserved for Future Issuance (Detail)	Dec. 31, 2023 shares
Class of Stock [Line Items]
Total shares reserved for future issuance	7,383,408
Class B Common Stock Converted Into Class A Common Stock [Member]
Class of Stock [Line Items]
Total shares reserved for future issuance	5,400,000
Employee Stock Option | 2009 Plan [Member]
Class of Stock [Line Items]
Total shares reserved for future issuance	222,846
Reserved Under the ESPP [Member]
Class of Stock [Line Items]
Total shares reserved for future issuance	221,391
Restricted Stock Units [Member] | 2009 Plan [Member]
Class of Stock [Line Items]
Total shares reserved for future issuance	182,401
Restricted Stock Units [Member] | 2019 Plan [Member]
Class of Stock [Line Items]
Total shares reserved for future issuance	1,356,770