Number of employee option modification.

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- Definition

Receivable for stock option exercises.

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- Definition

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

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- Definition

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

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- Definition

Aggregate number of common shares reserved for future issuance.

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

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- Definition

Amount of cost to be recognized for 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 number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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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) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) Option $ / shares shares	Dec. 31, 2017 USD ($) $ / shares	Jul. 01, 2019 shares	Dec. 31, 2016 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial share reserve	33,656,200
Weighted-average remaining contractual life options outstanding	6 years 9 months 18 days
Weighted-average remaining contractual life vested and exercisable options outstanding	5 years 6 months
Weighted-average grant date fair value \| $ / shares	$ 6.87	$ 4.15	$ 4.00
Total intrinsic value of options exercised \| $	$ 39,100	$ 3,800	$ 1,300
Weighted-average volatility	68.10%	68.10%	70.20%
Share-based compensation expense \| $	$ 13,124	$ 11,149	$ 7,009
Number of employee option modification \| Option		1
Incremental stock compensation \| $		$ 500
Unrecognized share-based compensation expense related to unvested stock options \| $	$ 33,300
Unrecognized share-based compensation expense related to unvested stock options, weighted-average period for recognition	2 years 10 months 24 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	6 months
Unrecognized share-based compensation expense related to unvested RSUs \| $	$ 200
Sequenta 2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0
2009 Equity Incentive Plan \| Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	0
2009 Equity Incentive Plan \| Options \| Non Employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	4 years
2009 Equity Incentive Plan \| Options \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option expiration period	10 years
2019 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance	15,396,254,000	6,827,996,000
Initial share reserve				15,519,170
2019 Plan \| Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial share reserve	15,519,170
Number of shares authorized for issuance	15,704,914
2019 Plan \| Options \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option expiration period	10 years
2019 Plan \| Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value \| $ / shares	$ 41.63
Share-based compensation outstanding shares	4,500				880,487
Share-based compensation granted shares	12,810
Share-based compensation granted shares vested	8,310
Weighted-average grant date fair value per share vested \| $ / shares	$ 41.63
Weighted-average grant date fair value per share nonvested and outstanding \| $ / shares	$ 41.63
2019 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 \| $	$ 500