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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Vallon - Q1 (Details)
$ in Thousands
Apr. 21, 2023
Sep. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Subsequent Event [Line Items]        
Reverse stock split 0.0333      
FDIC insured amount   $ 250    
Uninsured cash balances   $ 2,988    
GRI Bio, Inc. (Formerly Vallon Pharmaceuticals, Inc.)        
Subsequent Event [Line Items]        
FDIC insured amount     $ 250  
Uninsured cash balances     $ 1,218 $ 3,281
GRI Bio, Inc. (Formerly Vallon Pharmaceuticals, Inc.) | Subsequent Event        
Subsequent Event [Line Items]        
Reverse stock split 0.0333