Percentage of vesting of share-based compensation awards that vests monthly during the vesting period.

No definition available.

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Period of time between issuance and maturity of bond, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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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.

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- Definition

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

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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

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- References

No definition available.

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- Definition

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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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

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

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- Definition

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

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

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

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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- Definition

Percentage of vesting of share-based compensation awards.

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Expected term of share-based compensation awards, 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 of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Share-Based Payments - SOP 2015 (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 25, 2016	Sep. 23, 2015	Apr. 02, 2015
Additional disclosures
Share-based compensation expense	$ 5,154	$ 5,732	$ 2,545
SOP 2015
Weighted average exercise price in $ per share
Outstanding balance at beginning of year (in dollars per share)	$ 8.35	$ 7.83	$ 7.61
Granted (in dollars per share)		9.02	8.02
Exercised (in dollars per share)			7.21
Forfeited (in dollars per share)	8.41	8.60	7.64
Outstanding balance at end of year (in dollars per share)	8.34	8.35	7.83
Vested and exercisable balance at end of year (in dollars per share)	$ 8.10	$ 7.68	$ 7.52
Options
Outstanding at beginning of year (in shares)	3,044,899	1,794,360	1,092,300
Granted (in shares)		1,458,300	922,130
Exercised (in shares)			(23,360)
Forfeited (in shares)	(201,986)	(207,761)	(196,710)
Outstanding at end of year (in shares)	2,842,913	3,044,899	1,794,360
Vested and exercisable at end of year (in shares)	1,844,590	989,656	452,210
Additional disclosures
Total intrinsic value of options exercised			$ 181
SOP 2015 \| $4.06 per share to $11.00 per share
Additional disclosures
Options outstanding (in shares)	2,842,913
Exercise price minimum range	$ 4.06
Exercise price maximum range	$ 11.00
Weighted average remaining contractual life	7 years 4 months 24 days
SOP 2015 \| Stock Options
Share-Based Payments
Vesting period	4 years
Additional disclosures
Share-based compensation expense	$ 3,200	$ 5,600	$ 2,500
Weighted-average grant date fair value (in dollars per share)		$ 5.05	$ 4.76
Fair Value Assumptions
Expected term of options (in years)		6 years 1 month 6 days	6 years
Dividend yield (as a percent)		0.00%	0.00%
Total unrecognized compensation related to unvested options	$ 5,400
Recognition period	2 years 1 month 6 days
SOP 2015 \| Stock Options \| Minimum
Fair Value Assumptions
Expected volatility (as a percent)		55.60%	59.80%
Risk-free interest rate (as a percent)		1.89%	1.15%
Term of U.S. treasury securities used to estimate risk free interest rate		5 years	5 years
SOP 2015 \| Stock Options \| Maximum
Fair Value Assumptions
Expected volatility (as a percent)		62.00%	67.20%
Risk-free interest rate (as a percent)		2.10%	2.09%
Term of U.S. treasury securities used to estimate risk free interest rate		7 years	7 years
SOP 2015 \| Stock Options \| Vesting period, year one
Share-Based Payments
Percentage that vests during the period	25.00%
SOP 2015 \| Stock Options \| Vesting period, years 2-4
Share-Based Payments
Percentage that vests during the period	75.00%
Monthly vesting percentage	2.083%
Nabriva Therapeutics AG ("Nabriva Austria") \| Common Stock \| SOP 2015
Share-Based Payments
Maximum number of shares authorized				346,235	177,499	95,000