Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Real Estate (Details)

v3.10.0.1
Summary of Significant Accounting Policies - Real Estate (Details)
12 Months Ended
Sep. 30, 2018
Minimum  
Real Estate Properties [Line Items]  
Percentage of sales price (at least) 20.00%
Maximum  
Real Estate Properties [Line Items]  
Percentage of sales price (at least) 25.00%