Property and Equipment - at cost (Details) - USD ($)	Apr. 30, 2017	Jul. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment - net	$ 49,447,142	$ 49,064,737
Construction in progress	554,809	1,697,292
Building Improvements at 9 Bond Street in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	554,809
Building improvements at 25 Elm Place in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress		1,697,292
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	80,448,661	77,693,718
Improvements to Leased Property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,478,012	1,478,012
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	6,067,805	6,067,805
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	554,809	1,697,292
Property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	88,549,287	86,936,827
Less accumulated depreciation	39,230,402	38,008,810
Property and equipment - net	49,318,885	48,928,017
Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	144,545	144,545
Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	193,016	195,478
Fixtures and equipment and other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	337,561	340,023
Less accumulated depreciation	209,304	203,303
Property and equipment - net	$ 128,257	$ 136,720