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 inducement grants for non-statutory stock options.

+ References

No definition available.

+ Details

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- 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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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

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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

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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

+ Details

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Period Type:	duration

- 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

+ Details

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

+ Details

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

+ 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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- Definition

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

+ References

+ 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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- 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

+ Details

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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 (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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- Definition

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

+ References

No definition available.

+ 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			3 Months Ended
	Dec. 31, 2020	Jun. 30, 2016	May 31, 2013	Mar. 31, 2021	Mar. 31, 2020	Jan. 31, 2020
Stock option plan
Share-based compensation expense				$ 25,707	$ 15,220
Restricted stock
Stock option plan
Grants in period (in shares)				850,365
Stock option
Stock option plan
Granted (in shares)				1,954,690
Expected dividend yield (as a percent)				0.00%
Weighted average grant date fair value (in dollars per share)				$ 46.90
Risk-free interest rate (as a percent)				0.51%
Expected volatility (as a percent)				88.61%
Expected term (in years)				5 years 6 months
1998 Employee, Director, and Consultant Stock Option Plan, 2009 Equity and Long-term Incentive Plan, and 2013 Stock Incentive Plan \| Common stock
Stock option plan
Number of shares available for issuance				0
1998 Employee, Director, and Consultant Stock Option Plan, 2009 Equity and Long-term Incentive Plan, and 2013 Stock Incentive Plan \| Common stock \| Maximum
Stock option plan
Number of shares subject to outstanding awards (in shares)			3,040,444
2009 Equity and Long Term Incentive Plan and 2013 Stock Incentive Plan \| Common stock
Stock option plan
Number of shares available for issuance			122,296
2013 Long Term Incentive Plan \| Minimum
Stock option plan
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 \| Common stock
Stock option plan
Number of shares available for issuance				826,484
2020 Inducement Stock Incentive Plan \| Common stock
Stock option plan
Number of shares available for issuance				1,205,375
Number of additional shares authorized (in shares)	1,000,000
2020 Inducement Stock Incentive Plan \| Common stock \| Maximum
Stock option plan
Number of shares authorized (in shares)						1,000,000
2020 Inducement Stock Incentive Plan \| Stock option
Stock option plan
Inducement grants for non-statutory stock options (in shares)				13,465
Employee Stock Purchase Plan
Stock option plan
Number of shares authorized (in shares)		1,000,000
Share-based compensation expense				$ 500
Award requisite service period		6 months
Purchase price of common stock, percent		85.00%
Employee stock purchase plan, voting percentage limit		5.00%