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STRATEGIC PARTNERSHIP AGREEMENT WITH ADVANTEST AND RELATED PARTY TRANSACTIONS (Details) - USD ($)
12 Months Ended
Oct. 31, 2022
Jul. 29, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Proceeds from Issuance of Common Stock         $ 65,078,000
Deferred revenues - current portion     $ 26,019,000 $ 23,691,000  
Strategic Partnership for Joint Development and Sales Technology Solutions          
Stock Issued During Period, Shares, New Issues (in shares)   3,306,924      
Proceeds from Issuance of Common Stock   $ 65,200,000      
Amendment #1 to Software License & Related Services Agreement          
Commitments from Advantest $ 50,000,000.0        
Commercial Agreement With Advantest          
Related party receivables     300,000 0  
Contract with Customer, Liability, Total     7,100,000 6,800,000  
Material costs and expenses incurred     0 0  
Commercial Agreement With Advantest | Analytics          
Advantest analytics revenue     $ 10,300,000 $ 10,600,000 $ 3,400,000