Property and Equipment - at cost (Details) - USD ($)	Apr. 30, 2019	Jul. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment - net	$ 52,443,167	$ 50,792,984
Construction in progress	1,800,060	1,786,980
Building Improvements at 9 Bond Street in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	292,730	102,640
Building improvements at 25 Elm Place in Brooklyn, NY [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	403,881	153,010
Building improvements at Jamaica, NY building [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	303,975	779,399
Building improvements at Fishkill, NY building [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	799,474	751,931
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	85,754,150	82,728,826
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	1,800,060	1,786,980
Property [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	95,100,027	92,061,623
Less accumulated depreciation	42,769,109	41,382,962
Property and equipment - net	52,330,918	50,678,661
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	164,066	205,619
Fixtures and equipment and other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	308,611	350,164
Less accumulated depreciation	196,362	235,841
Property and equipment - net	112,249	$ 114,323
Cost [Member] | Fishkill, New York Property [Member]
Property, Plant and Equipment [Line Items]
Construction in progress	$ 1,800