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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, RISKS AND UNCERTAINTIES - Cost and Accumulated Depreciation for Real Estate Properties (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Accounting Policies [Abstract]    
Real estate properties $ 43,389 $ 72,507
Accumulated depreciation (27,588) (43,570)
Real estate properties, net $ 15,801 $ 28,937