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INVESTMENTS (Details) - Investments Classified by Contractual Maturity Date
$ in Thousands
Jun. 30, 2021
USD ($)
Investments Classified by Contractual Maturity Date [Abstract]  
Net Carrying Amount, Convertible debentures $ 8,741
Net Carrying Amount, Due after five years through ten years 1,000
Fair Value, Convertible debentures 17,049
Fair Value, Due after five years through ten years $ 1,003