Employee Stock Purchase Plan, Voting Percentage Limit, Percent

No definition available.

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- Definition

Represents the percentage of shares outstanding to be added annually on the first day of each fiscal year in the number of shares authorized.

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares to be added annually on the first day of each fiscal year in the number of shares authorized.

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares subject to outstanding awards used to calculate authorized shares.

+ References

No definition available.

+ Details

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- Definition

Represents the exercise price expressed as a percentage of the fair market value of the common stock as of the date of grant, at which grantees can acquire the shares reserved for issuance of stock options awarded.

+ References

No definition available.

+ Details

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- Definition

Represents the exercise price expressed as a percentage of the fair market value of the common stock as of the date of grant, at which grantees with specified common stock ownership percentage can acquire the shares reserved for issuance of stock options awarded.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Represents the exercise price at which grantees can acquire the shares reserved for issuance of stock options awarded.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Represents the stockholder's specified ownership percentage of the entity's common stock used in determination of the exercise price of stock options granted.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Balance Type:	debit
Period Type:	instant

- 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.

+ References

+ Details

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Balance Type:	na
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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
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+ Details

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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.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Number of options vested.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Stock award plan - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended			12 Months Ended
	Mar. 05, 2013	Dec. 31, 2020	May 31, 2016	May 31, 2013	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 31, 2020
Stock option plan
Share-based compensation expense					$ 70,325	$ 42,134	$ 33,252
Unrecognized compensation cost		$ 159,000			$ 159,000
Weighted average remaining service period for recognition of unrecognized compensation cost					2 years 8 months 23 days
Unvested restricted stock
Stock option plan
Granted (in shares)					663,045
Stock option
Stock option plan
Granted (in shares)					2,777,975	3,977,995	3,181,623
Forfeited (in shares)					889,785	518,527	461,934
Expected dividend yield (as a percent)					0.00%	0.00%	0.00%
Weighted average grant date fair value (in dollars per share)					$ 36.94	$ 23.05	$ 17.48
Stock option \| Maximum
Stock option plan
Vesting period					4 years
SARs
Stock option plan
Granted (in shares)			897,290
Vested (in shares)					132,136
Vesting period			4 years
Share-based compensation expense					$ 0
Employee Stock Purchase Plan
Stock option plan
Number of shares authorized (in shares)		1,000,000			1,000,000
Award requisite service period					6 months
Share-based compensation expense					$ 1,900
Employee Stock Purchase Plan \| Minimum
Stock option plan
Purchase price of common stock, percent					85.00%
Employee stock purchase plan, voting percentage limit					5.00%
2009 Equity and Long Term Incentive Plan and 2013 Stock Incentive Plan
Stock option plan
Number of shares available for issuance				122,296
2009 Equity and Long Term Incentive Plan
Stock option plan
Number of shares available for issuance				0
Number of additional shares authorized (in shares)				2,500,000
2009 Equity and Long Term Incentive Plan \| Stock option
Stock option plan
Stockholder's specified ownership percentage		10.00%			10.00%
Expiration period					10 years
2009 Equity and Long Term Incentive Plan \| Stock option \| Minimum
Stock option plan
Stock options granted, exercise price as percentage of the fair market value of common stock at grant date		100.00%			100.00%
Stock options granted to stockholder with specified ownership percentage, exercise price as percentage of the fair market value of common stock at grant date		110.00%			110.00%
2013 Stock Incentive Plan
Stock option plan
Number of shares authorized (in shares)	739,937
Number of shares available for issuance	0
2013 Stock Incentive Plan \| Unvested restricted stock
Stock option plan
Granted (in shares)	735,324
2013 Stock Incentive Plan \| Stock option
Stock option plan
Granted (in shares)	4,613
2013 Long Term Incentive Plan
Stock option plan
Number of shares available for issuance		941,381			941,381
Share based Compensation Arrangement by Share based Payment Award Number of Shares Authorized Annual Increase Number				2,500,000
Annual increase in the number of shares outstanding on the first day of the fiscal year				4.00%
2013 Long Term Incentive Plan \| Maximum
Stock option plan
Number of shares subject to outstanding awards (in shares)				3,040,444
2020 Inducement Stock Incentive Plan
Stock option plan
Number of shares available for issuance		1,186,005			1,186,005
Number of additional shares authorized (in shares)		1,000,000
2020 Inducement Stock Incentive Plan \| Maximum
Stock option plan
Number of shares authorized (in shares)								1,000,000
2020 Inducement Stock Incentive Plan \| Restricted stock units
Stock option plan
Granted (in shares)					73,645
Inducement Grant Plan -Nasdaq exception \| Stock option
Stock option plan
Granted (in shares)					740,350
Granted (in dollars per share)					$ 51.33
Forfeited (in shares)					357,052