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Investment in Real Estate, Net - Schedule of Investment in Real Estate (Details) - USD ($)
Sep. 30, 2020
Jun. 30, 2020
Real estate investment, Gross $ 45,417,000 $ 48,870,000
Real estate investment, Accumulated depreciation (43,349,000) (44,112,000)
Real estate investment, Land held for development 1,468,000 1,468,000
Real estate investment, Net 46,885,000 50,338,000
Land [Member]    
Real estate investment, Gross 21,568,000 23,565,000
Buildings, Improvements and Equipment [Member]    
Real estate investment, Gross $ 67,198,000 $ 69,417,000