CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2018 |
Apr. 30, 2017 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Unrealized holding gains arising during the period, tax | $ (27,037) | $ 33,500 | $ 43,963 | $ 40,000 |
| Reclassification adjustment for net gains included in net income, tax | $ (7,770) | $ (14,500) | $ (7,963) | $ (14,000) |