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THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Fair Value on Recurring and Non-recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Jul. 23, 2021
Non-current Assets      
Total non-current assets recorded at fair value $ 0    
Non-current Liabilities      
Total non-current liabilities recorded at fair value 0    
Recurring      
Current Assets:      
Total current assets recorded at fair value 68,676 $ 109,883  
Recurring | Money market account      
Current Assets:      
Total current assets recorded at fair value 68,676 109,883  
Recurring | Level 1      
Current Assets:      
Total current assets recorded at fair value 68,676 109,883  
Recurring | Level 1 | Money market account      
Current Assets:      
Total current assets recorded at fair value $ 68,676 109,883  
Non-recurring      
Non-current Assets      
Land grant   1,378  
Total non-current assets recorded at fair value   1,378  
Non-current Liabilities      
Land grant obligation   (1,378)  
Total non-current liabilities recorded at fair value   (1,378)  
Non-recurring | Level 2      
Non-current Assets      
Land grant    
Total non-current assets recorded at fair value    
Non-current Liabilities      
Land grant obligation    
Total non-current liabilities recorded at fair value    
Non-recurring | Level 3      
Non-current Assets      
Land grant   1,378  
Total non-current assets recorded at fair value   1,378  
Non-current Liabilities      
Land grant obligation   (1,378)  
Total non-current liabilities recorded at fair value   (1,378)  
Alabama Graphite      
Non-current Assets      
Land grant   $ 1,400  
Alabama Graphite | Non-recurring      
Non-current Assets      
Land grant     $ 1,400