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Price of a single share of a number of saleable stocks of a company.

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Stock Award Plans - Additional Information (Detail) - USD ($)		12 Months Ended
	May 17, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 31, 2020	May 31, 2018	May 16, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 13,447,000	$ 12,200,000	$ 6,511,000
Options issued or granted		0	0
Weighted average grant date fair value of the stock options granted				$ 970,000
Weighted average grant date fair value of the stock options vested		$ 3,200,000	$ 2,300,000	$ 4,500,000
Total intrinsic value of options exercised		$ 2,400,000	$ 1,700,000	$ 500,000
Cash received from the exercise of options		3,000,000.0	1,000,000.0	600,000
Total fair value of restricted stock units vested		4,400,000	6,700,000	2,500,000
Total grant date fair value of restricted stock units outstanding		43,200,000	19,300,000	13,300,000
Issuance of common stock under Employee Stock Purchase Plan		2,082,000	1,090,000	684,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan		$ 6,000	$ 5,000	$ 6,000
Issuance of common stock under Employee Stock Purchase Plan (in shares)		686,000	527,000	627,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance		400,000
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan		$ 25,000
Issuance of common stock under Employee Stock Purchase Plan (in shares)		5,000
Employee \| ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount on purchase price percentage of fair market value		8500.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		10 years
Unrecognized compensation expense, weighted average period for recognition		2 years 2 months 19 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Unrecognized compensation expense, weighted average period for recognition		2 years 29 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		36 months
Vesting rights percentage		25.00%
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Restricted Stock \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rights percentage		25.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per share		$ 6.10
Vesting date		May 10, 2025
Common stock price per share	$ 2.95
Risk-free interest rate	2.81%
Volatility	75.00%
Dividend yield	0.00%
Unrecognized compensation expense related to non-option		$ 25,000,000.0
RSUs \| Less than 25th Percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentile		25.00%
Percent of target		0.00%
RSUs \| 25th Percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentile		25.00%
Percent of target		50.00%
RSUs \| 50th Percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentile		50.00%
Percent of target		100.00%
RSUs \| 75th Percentile
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentile		75.00%
Percent of target		200.00%
RSUs \| 90th Percentile or Higher
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentile		90.00%
RSUs \| Maximum \| 90th Percentile or Higher
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of target		300.00%
RSUs and Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 12,800,000	$ 11,500,000	$ 6,200,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		600,000	700,000	300,000
Performance-based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost		100,000	100,000	$ 200,000
Unrecognized compensation expense related to options		200,000	$ 300,000
Options and Performance-based Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to options		$ 600,000
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity incentive plan, shares						12,000,000
Equity incentive plan, number of shares available for grant increased by shares					12,500,000
Exercise or strike price of fair market value of underlying common stock on date of grant reacquired or withheld					100.00%
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity incentive plan, shares							0