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Equity Incentive Plans and Warrants, Stock Option Plan, Activity (Details) - 2021 Stock Option Plan [Member] - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2023
Number of Options [Roll Forward]        
Beginning balance (in shares) 1,019,671 886,495 931,550 931,550
Granted (in shares) 1,064,800 153,200 5,000  
Forfeited (in shares) (5,200) (20,024) (50,055)  
Ending balance (in shares) 2,079,271 1,019,671 886,495 2,079,271
Weighted Average Exercise Price [Abstract]        
Beginning balance (in dollars per share) $ 3.57 $ 4.07 $ 3.97 $ 3.97
Granted (in dollars per share) 0.49 0.75 1.18  
Forfeited (in dollars per share) 1.25 3.94 1.87  
Ending balance (in dollars per share) $ 2 $ 3.57 $ 4.07 $ 2
Options vested and exercisable [Abstract]        
Options vested and exercisable, Number of option vested (in shares) 1,217,298     1,217,298
Options vested and exercisable, Exercise price (in dollars per share) $ 2.62     $ 2.62
Estimated Fair Value Assumptions [Abstract]        
Options exercised (in shares)       0
Common stock reserved for issuance (in shares) 652,314     652,314
Employees [Member]        
Number of Options [Roll Forward]        
Granted (in shares)       1,150,000
Weighted Average Exercise Price [Abstract]        
Granted (in dollars per share)       $ 0.52
Options vested and exercisable [Abstract]        
Weighted-average fair values of options granted (in dollars per share)       $ 0.42
Estimated Fair Value Assumptions [Abstract]        
Expected term (in years)       5 years 7 months 6 days
Risk free interest rate       4.06%
Dividend yield       0.00%
Expected volatility       105.14%
Nonemployee [Member]        
Number of Options [Roll Forward]        
Granted (in shares)       73,000
Weighted Average Exercise Price [Abstract]        
Granted (in dollars per share)       $ 0.64
Options vested and exercisable [Abstract]        
Weighted-average fair values of options granted (in dollars per share)       $ 0.51
Estimated Fair Value Assumptions [Abstract]        
Expected term (in years)       5 years 5 months 26 days
Risk free interest rate       3.96%
Dividend yield       0.00%
Expected volatility       106.58%