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OPERATING LEASES (Details) - USD ($)
Mar. 10, 2020
Oct. 01, 2019
Jun. 30, 2021
Dec. 31, 2020
Oct. 31, 2019
Apr. 30, 2019
Lessee Lease Description [Line Items]            
Operating lease, right-of-use assets     $ 5,029,000 $ 5,295,000    
Operating lease liability     $ 5,429,000      
Parsippany, New Jersey Office Space Lease            
Lessee Lease Description [Line Items]            
Operating lease, initial term           11 years
Operating lease term, option to extend additional period           5 years
Operating lease, right-of-use assets   $ 2,356,000        
Operating lease liability   $ 2,356,000        
Operating lease, rent abatement period   7 months        
Operating lease, percentage of discount rate   8.00%        
Foster City, California Office Space Lease            
Lessee Lease Description [Line Items]            
Operating lease, initial term 87 months       87 months  
Operating lease term, option to extend additional period         5 years  
Operating lease, right-of-use assets $ 3,426,000          
Operating lease liability $ 3,426,000          
Operating lease, rent abatement period 3 months          
Operating lease, percentage of discount rate 7.00%