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Stockholders' Equity - Inducement Plan - Stock Option Activity (Details) - Inducement Plan - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
OUTSTANDING OPTIONS      
Outstanding at beginning of period 2,333,525    
Options granted 360,000    
Options exercised 0 0  
Options forfeited (67,708)    
Outstanding at end of period 2,625,817   2,333,525
WEIGHTED-AVERAGE EXERCISE PRICE      
Outstanding at beginning of period $ 1.82    
Options granted 2.76    
Options forfeited 1.38    
Outstanding at end of period $ 1.96   $ 1.82
VESTED AND EXPECTED TO VEST      
Outstanding options 2,041,617    
Weighted-Average Exercise Price $ 1.95    
Weighted-Average Remaining Contractual Term 8 years 2 months 12 days    
Aggregate Intrinsic Value (in thousands) $ 247    
ADDITIONAL DISCLOSURES      
Outstanding options exercisable at end of period 820,225    
Weighted-average exercise price exercisable at end of period $ 1.89    
Weighted-average contractual term outstanding 8 years 1 month 6 days   8 years 8 months 12 days
Weighted-average contractual term (years) exercisable 7 years 7 months 6 days    
Aggregate intrinsic value (in thousands) outstanding at end of period $ 262    
Aggregate intrinsic value (in thousands) exercisable at end of period $ 80