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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, 2021
Sep. 30, 2020
Accounting Policies [Abstract]    
Real estate properties $ 43,302 $ 43,389
Accumulated depreciation (28,846) (27,588)
Real estate properties, net $ 14,456 $ 15,801