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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Compensation expense included in the Company’s consolidated statements of (loss) income for all share-based compensation arrangements was as follows for the periods ended December 31, 2021, 2020 and 2019, respectively:

Share-based Compensation Expense:						2021						2020						2019
Research and development						$	758					$	139					$	429
Selling, general and administrative						8,114						3,281						2,154
Restructuring costs						—						(421)						(2,064)
Total share-based compensation expense						$	8,872					$	2,999					$	519

Schedule of Share Based Payment Award Stock Options and Warrant Grants Valuation Assumptions

The weighted-average assumptions under the Black-Scholes option-pricing model for stock option grants as of December 31, 2021, 2020 and 2019, are as follows:   

Stock Option Assumptions:						2021						2020						2019
Stock option grants:
Expected term (years)						6.20						6.08						6.25
Expected volatility						73.91		%				75.76		%				56.48		%
Risk-free interest rate						1.10		%				0.72		%				2.52		%
Expected dividend yield						—						—						—

Schedule of Share-based Compensation, Stock Options, Activity

A summary of the combined stock option activity and other data for the Company’s stock option plans for the year ended December 31, 2021 is as follows:   

Stock Option Activity and Other Data:						Number of Stock Options						Weighted Average Exercise Price per Share						Weighted Average Remaining Contractual Life						Aggregate Intrinsic Value
Stock options outstanding, January 1, 2021						5,898						$	7.02
Granted						2,857						8.20
Exercised						(48)						3.54
Forfeited						(234)						7.13
Expired						(70)						12.62
Stock options outstanding, December 31, 2021						8,403						$	7.39					7.83 years						$	12,204
Stock options exercisable, December 31, 2021						3,256						$	7.88					5.88 years						$	6,291

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

A summary of the Company’s restricted share awards as of December 31, 2021, and changes during the year then ended, is reflected in the table below. 

Restricted Share Activity and Other Data:						Number of Restricted Share Awards						Weighted Average Grant Date Fair Value
Non-vested restricted share awards outstanding, January 1, 2021						347						$	5.87
Granted						99						8.22
Vested						(160)						5.05
Forfeited						(12)						7.08
Non-vested restricted share awards outstanding, December 31, 2021						274						$	7.14

A summary of the Company’s performance share units awards as of December 31, 2021, and changes during the year then ended, is reflected in the table below.

Performance Unit Share Activity and Other Data						Number of Performance Share Awards						Weighted Average Grant Date Fair Value
Non-vested performance share awards outstanding, January 1, 2021						257						$	7.09
Granted						285						8.20
Vested						—						—
Forfeited						(7)						5.36
Non-vested performance share awards outstanding, December 31, 2021						535						$	7.71

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options and Warrants grants.

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