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ACCOUNTING POLICIES - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2023
USD ($)
segment
Dec. 31, 2022
USD ($)
Concentration of credit risk    
Restricted cash $ 264 $ 264
Number of operating segments | segment 1  
Michigan State University    
Concentration of credit risk    
Accounts and unbilled receivables   $ 30
Equipment    
Concentration of credit risk    
Estimated useful life 3 years  
Furniture and fixtures    
Concentration of credit risk    
Estimated useful life 5 years  
Software    
Concentration of credit risk    
Estimated useful life 3 years