CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 606,234	$ 451,391	$ 1,391,821	$ 1,075,492
Unrealized gain (loss) on available-for-sale securities:
Unrealized gains (losses) arising during the period, net of taxes (benefit) of $19,000 and $23,000 for the three months ended April 30, 2017 and 2016, respectively, and $26,000 and ($5,000) for the nine months ended April 30, 2017 and 2016, respectively.	38,715	43,213	51,944	(10,241)
Comprehensive income	$ 644,949	$ 494,604	$ 1,443,765	$ 1,065,251