Note 4 - Real Estate Assets (Details Textual)	Sep. 30, 2020	Sep. 30, 2019
Number of Real Estate Properties	128
Number of Real Estate Properties Held for Sale	4
Executive Office Park [Member]
Number of Real Estate Properties	4
Number of Real Estate Properties Held for Sale	1
Model Home [Member]
Number of Real Estate Properties	25	18
Number of Real Estate Properties Held for Sale	1