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Portion of stock units subject to performance condition description two.

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No definition available.

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Resignation date of employee.

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Share based compensation arrangement by share based payment award equity instruments other than options vested weighted average remaining contractual term.

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, cumulative measurement.

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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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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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-Publisher FASB
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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

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-Publisher FASB
-Name Accounting Standards Codification
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Percentage of vesting of share-based compensation awards.

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Share-Based Payment Awards - Performance-Based Stock Units - Additional Information (Detail) - USD ($)					3 Months Ended		6 Months Ended
	Oct. 12, 2019	Mar. 19, 2019	Oct. 12, 2018	Mar. 19, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Stock-based compensation expense					$ 1,496,000	$ 974,000	$ 2,734,000	$ 1,417,000
Performance Stock Units [Member]
Class of Stock [Line Items]
Stock-based compensation expense					$ 0		$ 0
Weighted average remaining vesting term							3 months 12 days
Performance Stock Units [Member] \| Chief Financial Officer [Member]
Class of Stock [Line Items]
Cumulative measurement period							3 years
Resignation date of employee							Jul. 08, 2019
Performance Stock Units [Member] \| Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Number of Stock Units Outstanding					225,000		225,000		225,000
Performance Stock Units [Member] \| Performance Condition One [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA acceptance of the Company's NDA submission of YUTIQ for review on or before March 31, 2018							One third
Stock units vesting, percentage		50.00%		50.00%
Number of Performance-Based Stock Units, vested				48,332
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date		48,334
Performance Stock Units [Member] \| Performance Condition Two [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA approval of YUTIQ on or before March 31, 2019							Two-thirds
Stock units vesting, percentage			50.00%
Number of Performance-Based Stock Units, vested			96,668
Performance Stock Units [Member] \| Performance Condition Two [Member] \| Scenario, Forecast [Member]
Class of Stock [Line Items]
Stock units vesting, percentage	50.00%
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date	96,666
Performance Stock Units [Member] \| Inducement Award Grants [Member] \| Chief Financial Officer [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award							The PSUs are subject to proportional vesting based on cumulative measurement over a 3-year period, with two-thirds of the award based upon the achievement of defined amounts of the Company’s product revenues through June 30, 2021 and one-third of the award based upon the net present value of each applicable business development transaction, as defined, through August 1, 2021 measured as of the date that each such transaction is consummated by the Company.