Accumulated Other Comprehensive Income (Details) - USD ($)	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Accumulated Other Comprehensive Income [Abstract]
Beginning balance, net of tax effect	$ 264,541	$ 196,033
Other comprehensive income, net of tax effect:
Unrealized (loss) on available-for-sale securities	(65,636)	(30,404)
Tax effect	22,500	11,000
Unrealized (loss) on available-for-sale securities, net of tax effect	(43,136)	(19,404)
Amounts reclassified from accumulated other comprehensive income, net of tax effect:
Unrealized (losses) on available-for-sale securities reclassified	(1,354)
Tax effect	500
Amount reclassified, net of tax effect	(854)
Ending balance, net of tax effect	$ 220,551	$ 176,629