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The number of shares for each option award under the equity-based compensation plan.

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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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Unrecognized cost of unvested options awarded to employees as compensation.

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

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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 grantees could have acquired the underlying shares with respect to stock options that were terminated.

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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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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 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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Share-Based Payments - SOP 2015 (Details) - SOP 2015 - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jun. 23, 2017	Aug. 25, 2016	Sep. 23, 2015	Apr. 02, 2015
Options
Outstanding at beginning of year (in shares)	3,044,899
Forfeited (in shares)	(29,050)
Outstanding at end of year (in shares)	3,015,849
Vested and exercisable at end of year (in shares)	1,337,202
Weighted average exercise price in $ per share
Outstanding balance at beginning of year (in dollars per share)	$ 8.35
Forfeited (in dollars per share)	7.49
Outstanding balance at end of year (in dollars per share)	8.35
Vested and exercisable balance at end of year (in dollars per share)	$ 7.88
Aggregate intrinsic value
Aggregate intrinsic value, outstanding	$ 3
Aggregate intrinsic value, vested and exercisable	1
Additional disclosures
Share-based compensation expense	$ 900	$ 700
Options
Share-Based Payments
Vesting period	4 years
Exercise period	10 years
Additional disclosures
Weighted-average remaining contractual life	8 years 2 months 12 days
Total unrecognized compensation related to non-vested options (in dollars)	$ 8,900
Period of recognition of total unrecognized compensation related to options	1 year 2 months 12 days
Options \| First year
Share-Based Payments
Vesting period	1 year
Percentage that vests during the period	25.00%
Options \| Second, third, and fourth years
Share-Based Payments
Percentage that vests during the period	75.00%
Monthly vesting percentage	2.083%
Nabriva Therapeutics plc ("Nabriva Ireland") \| Redomiciliation Transaction \| Ordinary Shares
Share-Based Payments
Number of shares to be awarded for each option when exercised			10
Nabriva Therapeutics AG ("Nabriva Austria") \| Common Stock
Share-Based Payments
Maximum number of shares authorized				346,235	177,499	95,000
Nabriva Therapeutics AG ("Nabriva Austria") \| Redomiciliation Transaction \| Common Stock
Share-Based Payments
Number of shares to be awarded for each option when exercised			1