Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Details 4)

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ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Details 4) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mandatorily redeemable equity instruments of subsidiary $ 7,193,000 $ 5,123,000
Mandatorily redeemable equity instruments of subsidiary, at fair value 7,193,000    
Fair Value, Inputs, Level 2 [Member]      
Mandatorily redeemable equity instruments of subsidiary    
Fair Value, Inputs, Level 1 [Member]      
Mandatorily redeemable equity instruments of subsidiary    
Fair Value, Inputs, Level 3 [Member]      
Mandatorily redeemable equity instruments of subsidiary $ 7,193,000