v3.26.1
STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of potential increase of shares authorized 5.00%   5.00%  
Award vesting period     3 years  
Options granted (in shares)   0 989,985 0
Unamortized stock-based compensation costs $ 3,100,000   $ 3,100,000  
Weighted average period of recognition for unamortized stock-based compensation costs     3 years 8 months 12 days  
Total stock-based compensation 614,000 $ 1,670,000 $ 1,403,000 $ 2,904,000
Nonemployee        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation $ 100,000 0 $ 300,000 0
Tranche two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage     6.25%  
Tranche one        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage     25.00%  
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average estimated fair value of options granted using Black-Scholes options pricing model (in USD per share) $ 1.57   $ 1.57  
ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Potential increase of shares authorized (in shares) 204,000   204,000  
Percentage of potential increase of shares authorized 1.00%   1.00%  
Increase in shares authorized for issuance (in shares)     204,000  
Maximum employee stock purchase amount     $ 25,000  
ESPP purchase price of common stock, percent of fair market value     85.00%  
Total stock-based compensation $ 5,000 $ 36,000 $ 24,000 $ 87,000
Number of shares reserved for future issuance (in shares) 223,235   223,235  
2021 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Potential increase of shares authorized (in shares) 1,017,333   1,017,333  
Increase in shares authorized for issuance (in shares)     1,017,333  
Shares authorized for issuance (in shares) 3,370,658   3,370,658  
Shares available for future grant (in shares) 500,855   500,855  
2021 Equity Incentive Plan | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share expiration period     10 years  
Award vesting period     4 years