Proceeds from settlement of stock option exercised in prior periods.

No definition available.

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- Definition

Receivable for stock option exercises.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award vested and exercisable options outstanding weighted average remaining contractual term.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

+ References

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- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity Incentive Plans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average remaining contractual life options outstanding			7 years 3 months 18 days
Weighted-average remaining contractual life vested and exercisable options			6 years
Proceeds from exercise of stock options			$ 20,513	$ 11,296
Proceeds from settlement of stock option exercised in prior periods			$ 300
Weighted-average volatility			68.30%	71.00%
Share-based compensation expense	$ 11,249	$ 6,373	$ 19,733	$ 11,048
Unrecognized share-based compensation expense related to unvested stock options	103,800		$ 103,800
Unrecognized share-based compensation expense related to unvested stock options, weighted-average period for recognition			3 years 1 month 6 days
Option Valuation Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend yield			0.00%
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense related to unvested stock options, weighted-average period for recognition			3 years 7 months 6 days
Unrecognized share-based compensation expense related to unvested RSUs	$ 27,400		$ 27,400
2009 Equity Incentive Plan \| Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0		0
2009 Equity Incentive Plan \| Grant \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option expiration period			10 years
2019 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	23,349,434		23,349,434		18,617,001
2019 Equity Incentive Plan \| Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
2019 Equity Incentive Plan \| Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized for issuance	29,124,570		29,124,570
2019 Equity Incentive Plan \| Grant \| Prepaid Expenses and Other Current Assets
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unsettled cash proceeds related to stock options exercised		$ 500		$ 500
2019 Equity Incentive Plan \| Grant \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option expiration period			10 years
2019 Equity Incentive Plan \| Restricted Stock Units \| Prepaid Expenses and Other Current Assets
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unsettled cash proceeds related to stock options exercised	$ 200		$ 200