Property and Equipment - at cost (Details) - USD ($)	Apr. 30, 2016	Jul. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment - net	$ 49,222,890	$ 48,191,392
Construction in progress	1,648,748	639,042
Building improvements at 9 Bond Street in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress		144,041
Building improvements at 25 Elm Place in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	1,648,748	495,001
Property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	86,682,357	84,474,345
Less accumulated depreciation	37,608,211	36,413,975
Property and equipment - net	49,074,146	48,060,370
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	77,487,792	76,289,486
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	1,648,748	639,042
Fixtures and equipment and other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	381,353	380,167
Less accumulated depreciation	232,609	249,145
Property and equipment - net	148,744	131,022
Fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	144,544	144,544
Other fixed assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 236,809	$ 235,623