XML 57 R45.htm IDEA: XBRL DOCUMENT v3.23.1
Stockholders' Equity - Inducement Plan - Stock Option Activity (Details) - Inducement Plan - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
OUTSTANDING OPTIONS      
Outstanding at beginning of period 1,813,600    
Options granted 535,000    
Options exercised 0   0
Options forfeited (15,075)    
Outstanding at end of period 2,333,525 1,813,600  
WEIGHTED-AVERAGE EXERCISE PRICE      
Outstanding at beginning of period $ 2.08    
Options granted 0.98    
Options forfeited 3.67    
Outstanding at end of period $ 1.82 $ 2.08  
VESTED AND EXPECTED TO VEST      
Outstanding options 1,749,325    
Weighted-Average Exercise Price $ 1.76    
Weighted-Average Remaining Contractual Term 8 years 9 months 18 days    
Aggregate Intrinsic Value (in thousands) $ 2,249    
ADDITIONAL DISCLOSURES      
Outstanding options exercisable at end of period 425,104    
Weighted-average exercise price exercisable at end of period $ 2.13    
Weighted-average contractual term outstanding 8 years 8 months 12 days 9 years 7 months 6 days  
Weighted-average contractual term (years) exercisable 8 years 6 months    
Aggregate intrinsic value (in thousands) outstanding at end of period $ 2,867    
Aggregate intrinsic value (in thousands) exercisable at end of period $ 402