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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 30, 2021
Accounting Policies [Abstract]  
Disaggregation of revenue
                    
   Three Months Ended   Six Months Ended 
   June 30,   June 30, 
   2021   2020   2021   2020 
   (In thousands) 
Paid-up revenue agreements  $16,600   $1,792   $22,010   $5,092 
Recurring Revenue Agreements   800    326    1,193    841 
Total revenue  $17,400   $2,118   $23,203   $5,933 
Schedule of equity securities
                    
   Cost   Gross
Unrealized
Gain
   Gross
Unrealized
Loss
   Fair Value 
   (In thousands) 
Security Type                
June 30, 2021:                    
Equity securities - LF equity  $31,665   $90,312   $(539)  $121,438 
Equity securities - other equity   12,891    819    (210)   13,500 
Equity securities at fair value  $44,556   $91,131   $(749)  $134,938 
                     
                     
December 31, 2020:                    
Equity securities - LF equity  $32,765   $72,689   $(583)  $104,871 
Equity securities - other equity   4,086    1,410    (1,264)   4,232 
Equity securities at fair value  $36,851   $74,099   $(1,847)  $109,103