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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loan Fees and Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Amortization of Deferred Loan Origination Fees, Net $ 1.0 $ 1.0