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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Share-based Compensation Expense
The Company recognized share-based compensation in its unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) during 2023 and 2022 as follows:
 Three Months Ended
September 30,		Nine Months Ended
September 30,
 2023202220232022
Manufacture and supply$59 $66 $155 $159 
Research and development105 75 277 406 
Selling, general and administrative610 394 1,334 3,104 
Total share-based compensation expenses$774 $535 $1,766 $3,669 
Share-based compensation from:
Restricted stock units$312 $58 $532 $97 
Stock options462 477 1,217 3,570 
Employee stock purchase plan (ESPP)— — 17 2 
Total share-based compensation expenses$774 $535 $1,766 $3,669 
Restricted Stock Units Awards
The following tables provide information about the Company’s restricted stock unit and stock option activity during the nine month period ended September 30, 2023:
Restricted Stock Unit Awards (RSUs) - Time-based:
Number of
Units		Weighted
Average
Grant Date Fair
Value
 (in thousands) 
Unvested as of December 31, 2022162 $2.38 
Granted1,874 $0.91 
Vested(31)$2.33 
Forfeited(57)$2.03 
Unvested as of September 30, 20231,948 $0.97 
Vested and expected to vest as of September 30, 20231,788 $0.97 
Performance Share Activity
Restricted Stock Unit Awards (RSUs) - Performance-based:
Number of
Units		Weighted
Average
Grant Date Fair
Value
 (in thousands) 
Unvested as of December 31, 2022— $— 
Granted1,332 2.03 
Vested— — 
Forfeited— — 
Unvested as of September 30, 20231,332 $2.03 
Vested and expected to vest as of September 30, 20231,166 $2.03 
Stock Option Activity
Stock Option Awards:Number of
Options		Weighted Average
Exercise Price
 (in thousands)
Outstanding as of December 31, 20226,028 $5.48 
Granted150 2.02 
Exercised
(1)0.88 
Forfeited/Expired
(264)2.30 
Outstanding as of September 30, 20235,913 $5.54 
Vested and expected to vest as of September 30, 20235,836 $5.59 
Exercisable as of September 30, 20234,437 $6.56 
The fair values of stock options granted during the nine months ended September 30, 2023 were estimated using the Black-Scholes pricing model based on the following assumptions:
Expected dividend yield—%
Expected volatility
100%
Expected term (years)5.5
Risk-free interest rate4.0%