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5. INVESTMENTS (Tables)
9 Months Ended
Sep. 30, 2020
Schedule of Investments [Abstract]  
Schedule of gain (loss) on investments
                    
   Three Months Ended   Nine Months Ended 
   September 30,   September 30, 
   2020   2019   2020   2019 
   (In thousands) 
Change in fair value of investment, warrants  $(3,081)   (3,216)  $225   $(822)
Change in fair value of investment, common stock       (1,050)   3,479    10,444 
Gain on sale of investment, warrants           554     
Loss on sale of investment, common stock       (915)   (3,316)   (8,147)
Net realized and unrealized gain (loss) on investment at fair value  $(3,081)  $(5,181)  $942   $1,475