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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense
The Company recorded stock-based compensation related to equity-based awards issued under the GRI Operations Plan and the A&R 2018 Plan in the following expense categories of its accompanying consolidated statements of operations for the three and nine months ended December 31, 2024 and 2023:
For the Year Ended December 31,
20242023
Research and development$— $— 
General and administrative148 388 
Total$148 $388 
The Company recorded stock-based compensation related to equity-based awards issued under the A&R 2018 Plan in the following expense categories of its accompanying consolidated statements of operations for the three and nine months ended September 30, 2025 and 2024:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2025202420252024
Research and development$59 $— $84 $— 
General and administrative406 37 642 111 
Total$465 $37 $726 $111 
Schedule of Activity of Stock Options Granted
The table below represents the activity of stock options granted to employees and non-employees for the year ended December 31, 2024:
Number of optionsWeighted average exercise priceWeighted average remaining contractual term (years)
Outstanding at December 31, 2023142 $4,376.92 9.63
Granted— 
Exercised— 
Forfeited— 
Outstanding at December 31, 2024142 $4,376.92 8.63
Exercisable at December 31, 202462 $5,475.38 8.57
Vested and expected to vest at December 31, 2024142 $4,376.92 8.63
The table below represents the activity of stock options granted to employees and non-employees for the nine months ended September 30, 2025:
Number of optionsWeighted-average exercise priceWeighted-average remaining contractual term (years)Aggregate Intrinsic Value ($)
Outstanding at December 31, 2024142$4,376.92 8.63— 
Granted421,132 $2.29 106 
Exercised— — — 
Forfeited/cancelled— — — 
Outstanding at September 30, 2025421,274$3.76 9.92106 
Exercisable at September 30, 2025291,431 $4.09 9.9144 
Vested and expected to vest at September 30, 2025421,274$3.76 9.92106 
Schedule of Valuation Assumptions The Black-Scholes option-pricing model was used to estimate the grant date fair value of each stock option grant at the time of grant using the following weighted-average assumptions:
For the Year Ended December 31, 2023
Volatility129.54 %
Expected term in years5.84
Dividend rate0.00 %
Risk-free interest rate4.34 %
Fair value of common stock on grant date$3,298.42 
Nine Months Ended September 30, 2025
Volatility120.89 %
Expected term in years5.18
Dividend rate0.00 %
Risk-free interest rate3.75 %
Fair value of option on grant date$1.92