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STOCK-BASED COMPENSATION - Stock Options (Details) - Stock Options - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Stock Incentive Plan 2017        
Stock option activity        
Options outstanding at beginning of year   11,286 12,697 12,697
Cancelled and forfeited   (5,433) (1,401)  
Balance at June 30: 11,296 5,853 11,296 11,286
Options exercisable at June 30 11,204 5,853 11,204  
Intrinsic value of options exercisable   $ 0   $ 0
Weighted average exercise price        
Options outstanding at beginning of year   $ 254.40 $ 257.10 $ 257.10
Cancelled and forfeited   215.35 275.70  
Balance at June 30 $ 254.70 285.36 254.70 $ 254.40
Options exercisable at June 30 $ 255.90 $ 285.36 $ 255.90  
Additional stock option information        
Stock compensation expense $ 17,000   $ 84,000  
Total unrecognized stock compensation expense   $ 0    
Weighted-average remaining contractual life   4 years 2 months 4 days   4 years 11 months 4 days
Stock Incentive Plan 2017 | Research and development        
Additional stock option information        
Stock compensation expense 9,000   61,000  
Stock Incentive Plan 2017 | General and administrative        
Additional stock option information        
Stock compensation expense $ 8,000   $ 23,000  
Stock Incentive Plan 2021        
Stock option activity        
Options outstanding at beginning of year   21,420    
Granted     24,480  
Cancelled and forfeited   (9,180)    
Balance at June 30: 24,480 12,240 24,480 21,420
Options exercisable at June 30 18,360 12,240 18,360  
Weighted average exercise price        
Options outstanding at beginning of year   $ 12.90    
Granted     $ 12.90  
Cancelled and forfeited   12.90    
Balance at June 30 $ 12.90 12.90 12.90 $ 12.90
Options exercisable at June 30 $ 12.90 $ 12.90 12.90  
Weighted average grant date fair value for options granted and expected to be vested during the year:     $ 10.80  
Additional stock option information        
Stock compensation expense   $ 0 $ 0  
Weighted-average remaining contractual life   4 years 2 months 4 days