Stockholders' Equity (Stock-Based Awards) - Additional Information (Detail) - shares				1 Months Ended	9 Months Ended
	Jan. 01, 2023	Jan. 01, 2022	Jan. 01, 2020	Apr. 30, 2019	Sep. 30, 2023	Dec. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance					53,656,248	84,187,372
Share based compensation options to purchase no of common stock					5,315,543	4,450,283
Share based compensation options grants in the period					1,562,000
2019 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, award description					The total number of shares of common stock that may be issued under the 2019 Plan and the 2012 Plan was 7,117,267 as of September 30, 2023, of which 1,801,724 shares remained available for grant under the 2019 Plan. Awards may be made under the 2019 Plan for up to such number of shares of the Company’s common stock as is equal to the sum of: i) 1,578,947 shares; plus ii) the number of shares (up to 1,157,894 shares) of the Company’s common stock subject to outstanding awards under the 2012 Plan that expire, terminate or are otherwise cancelled, forfeited or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right; plus iii) an annual increase to be added on the first day of each fiscal year, beginning with 2020 and continuing through 2029, equal to the least of (a) 2,105,623 shares of common stock, (b) 4% of the number of outstanding shares of the Company’s common stock on such date, and (c) an amount determined by the Company’s board of directors.
Number of shares available for grant					1,801,724
Common stock, capital shares reserved for future issuance	2,105,623	1,140,232			1,578,947
Share based compensation grant period					10 years
Share based compensation vesting description					Options granted under the 2019 Plan and the 2012 Plan have a maximum term of ten years. Options granted to employees, officers and non-employees generally vest over four years based on varying vesting schedules that primarily include: 25% vesting on the first anniversary date of grant and the balance ratably over the next 36 months or vesting in equal monthly or quarterly installments over four years.
Share based compensation options to purchase no of common stock					4,747,300	3,848,052
2019 Stock Incentive Plan [Member] | Employees, Officers and Non-employee Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					4 years
2019 Stock Incentive Plan [Member] | Employees, Officers and Non-employee Consultants [Member] | Vesting First Anniversary Date of Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting Percentage					25.00%
2019 Stock Incentive Plan [Member] | Director [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					1 year
2019 Stock Incentive Plan [Member] | Director [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					2 years
2019 Stock Incentive Plan [Member] | Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in additional number of shares to be issued			2,105,623
Percentage of number of common stock, shares outstanding	4.00%	4.00%	4.00%
2019 Plan and 2012 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total number of common shares authorized under the plan					7,117,267
2012 Stock Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grant period					10 years
Share based compensation vesting description					Options granted under the 2019 Plan and the 2012 Plan have a maximum term of ten years. Options granted to employees, officers and non-employees generally vest over four years based on varying vesting schedules that primarily include: 25% vesting on the first anniversary date of grant and the balance ratably over the next 36 months or vesting in equal monthly or quarterly installments over four years.
Share based compensation options to purchase no of common stock					568,243	602,231
2012 Stock Incentive Plan [Member] | Other Equity-Based Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation options grants in the period					0
2012 Stock Incentive Plan [Member] | Employees, Officers and Non-employee Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					4 years
2012 Stock Incentive Plan [Member] | Employees, Officers and Non-employee Consultants [Member] | Vesting First Anniversary Date of Grant [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting Percentage					25.00%
2012 Stock Incentive Plan [Member] | Director [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					1 year
2012 Stock Incentive Plan [Member] | Director [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation vesting period					2 years
2012 Stock Incentive Plan [Member] | Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation options to purchase number of shares outstanding					1,157,894
2019 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, award description					The total number of shares of common stock that may be issued under the 2019 ESPP was 1,208,274 as of September 30, 2023. The number of shares of the Company’s common stock that have been approved to be issued under the 2019 ESPP is equal to the sum of i) 155,106 shares plus ii) an annual increase to be added on the first day of each fiscal year, beginning with the fiscal year ending December 31, 2020 and continuing for each fiscal year until and including, the fiscal year ending December 31, 2029, equal to the least of (a) 526,315 shares of common stock, (b) 1% of the number of outstanding shares of the Company’s common stock on such date and (c) an amount determined by the Company’s board of directors. Effective January 1, 2023 and January 1, 2022, respectively, the aggregate number of shares of the Company’s common stock that may be issued under the 2019 ESPP increased, pursuant to the terms of the 2019 ESPP, by an additional 526,315 shares and 285,058 shares, equal to the 2019 ESPP determined maximum and 1% of the Company’s then-outstanding common stock, respectively
Total number of common shares authorized under the plan					1,208,274
Common stock, capital shares reserved for future issuance				155,106
2019 Employee Stock Purchase Plan [Member] | Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in additional number of shares to be issued	526,315	285,058		526,315
Percentage of number of common stock, shares outstanding	1.00%	1.00%		1.00%