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Share-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Share-based Compensation Expense
The Company recognized share-based compensation in its unaudited Condensed Statements of Operations and Comprehensive (Loss) Income during 2024 and 2023 as follows:
 Three Months Ended
March 31,
 20242023
Manufacture and supply$70 $41 
Research and development170 72 
Selling, general and administrative1,340 231 
Total share-based compensation expenses$1,580 $344 
Share-based compensation from:
Restricted stock units$933 $25 
Stock options647 319 
Total share-based compensation expenses$1,580 $344 
Restricted Stock Units Awards
The following tables provide information about the Company’s restricted stock unit and stock option activity during the three month period ended March 31, 2024:
Restricted Stock Unit Awards (RSUs) - Service-based:
Number of
Units		Weighted
Average
Grant Date Fair
Value
 (in thousands) 
Unvested as of December 31, 20231,948 $0.97 
Granted1,353 $5.68 
Vested(565)$0.89 
Unvested as of March 31, 20242,736 $3.32 
Vested and expected to vest as of March 31, 20242,488 $3.28 
As of March 31, 2024, $7,865 of total unrecognized compensation expenses related to unvested service-based restricted stock units are expected to be recognized over a weighted average period of 2.43 years from the date of grant. The service-based restricted stock units granted to employees are subject to a three-year graduated vesting schedule and are not subject to performance-based criteria other than continued employment.
Performance Share Activity
Restricted Stock Unit Awards (RSUs) - Market conditions vesting-based:
Number of
Units		Weighted
Average
Grant Date Fair
Value
 (in thousands) 
Unvested as of December 31, 20231,332 $2.40 
Vested(150)2.40 
Forfeited— — 
Unvested as of March 31, 20241,182 $2.40 
Vested and expected to vest as of March 31, 20241,061 $2.40 
Stock Option Activity
Stock Option Awards:Number of
Options		Weighted Average
Exercise Price
 (in thousands)
Outstanding as of December 31, 20235,733 $5.58 
Granted739 5.68 
Exercised(231)2.33 
Forfeited/Expired(72)4.76 
Outstanding as of March 31, 20246,169 $5.72 
Vested and expected to vest as of March 31, 20246,053 $5.75 
Exercisable as of March 31, 20244,442 $6.56 
The fair values of stock options granted during the three months ended March 31, 2024 were estimated using the Black-Scholes pricing model based on the following assumptions:
Expected dividend yield—%
Expected volatility
104%
Expected term (years)6.1
Risk-free interest rate4.1%