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Compensation Related Costs, Share Based Payments (Tables)
6 Months Ended
Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] The Company utilized the Black-Scholes valuation model for estimating the fair value of the stock option compensation granted, with the following weighted-average assumptions for stock options granted in the six months ended June 30, 2023 and 2022:
 Expected VolatilityRisk-free Interest RateExpected TermDividend
Rate
June 30, 2023    
Employees113 %3.8 %4— %
Officers and non-employee directors99 %3.9 %6— %
June 30, 2022
Employees106 %2.1 %4— %
Officers and non-employee directors91 %1.9 %7— %
Share-based Payment Arrangement, Option, Activity [Table Text Block]
The following is a summary of stock option activity under Lexicon’s stock-based compensation plans for the six months ended June 30, 2023:
 Stock OptionsWeighted Average Exercise Price
 (in thousands) 
Outstanding at December 31, 202212,349 $5.10 
Granted6,825 2.46 
Expired(152)14.68 
Forfeited(522)3.78 
Outstanding at June 30, 202318,500 4.08 
Exercisable at June 30, 20237,357 $5.94 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] The following is a summary of restricted stock unit activity under Lexicon’s stock-based compensation plans for the six months ended June 30, 2023:
 RSU’sWeighted Average Grant Date
Fair Value
 (in thousands) 
Outstanding at December 31, 20222,748 $3.78 
Granted4,199 2.41 
Vested(1,290)3.80 
Forfeited(230)2.70 
Outstanding at June 30, 20235,427 $2.76