Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		6 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Accumulated Other Comprehensive Income: [Abstract]
Beginning balance, net of tax effect	$ 171,574	$ 108,715	$ 129,412	$ 183,633
Other comprehensive income, net of tax effect:
Unrealized gains (losses) on available-for-sale securities	(22,823)	(31,288)	52,339	(11,019)
Tax effect	10,000	15,000	(23,000)	6,000
Unrealized gains (losses) on available-for-sale securities, net of tax effect	(12,823)	(16,288)	29,339	(5,019)
Amounts reclassified from accumulated other comprehensive income, net of tax effect:
Unrealized (losses) on available-for-sale securities reclassified				(155,187)
Tax effect				69,000
Amounts reclassified, net of tax effect				(86,187)
Ending balance, net of tax effect	$ 158,751	$ 92,427	$ 158,751	$ 92,427