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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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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

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- References

No definition available.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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- Definition

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

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No definition available.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Share Price	$ 21.61		$ 21.61
Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding
Outstanding at beginning of the period			3,025,587
Exercised			(218,622)
Outstanding at end of period	2,806,965		2,806,965
Exercisable at end of period	2,806,965		2,806,965
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Outstanding at beginning of the period			$ 9.83
Exercised			3.82
Outstanding at end of period	$ 10.30		10.30
Exercisable at end of period	$ 10.30		$ 10.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Weighted average remaining contractual term for option awards outstanding			2 years 9 months 18 days
Intrinsic value of the underlying stock exceeds the exercise price of options outstanding	$ 31,750		$ 31,750
Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable			2 years 9 months 18 days
Intrinsic value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable	31,750		$ 31,750
Granted in period			0
Forfeitures in period			0
Expirations in period			0
Intrinsic value of stock options exercised	1,633	$ 749	$ 3,759	$ 1,275
Fair value of stock options vested	$ 155	$ 62	$ 333	$ 99