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STOCK-BASED COMPENSATION - Narrative (Details) - shares
9 Months Ended 17 Months Ended
Sep. 09, 2022
May 17, 2022
Sep. 30, 2022
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of additional shares authorized (in share) 1,750,000      
Stock purchase offering period     6 months  
2020 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of additional shares authorized (in share)   119,377    
Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, shares issued in period ( in share )       9,293
Outstanding options | 2009 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares)     26,342 26,342
Outstanding options | Vical Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares)     1,836 1,836
Outstanding options | 2020 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares)     194,741 194,741
Shares available for grant (in share)     134,240 134,240
Shares authorized (in shares)     323,364 323,364
Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in share)     48,484 48,484
Employee Stock | Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Discount from market price, purchase date     85.00%