Accounting Records and Use of Estimates (Narrative) (Details) - USD ($) |
9 Months Ended | |||
|---|---|---|---|---|
Apr. 30, 2018 |
Jul. 31, 2019 |
Jul. 31, 2018 |
Jul. 31, 2017 |
|
| Operating Loss Carryforwards [Line Items] | ||||
| Period over which state capital-based tax will be phased out | 7 years | |||
| Deferred Income Tax | $ 2,400,000 | |||
| Subsequent Event [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Corporate income tax | 21.00% | 26.00% | ||
| Domestic Tax Authority [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Operating loss carryforwards | $ 5,366,000 | |||
| State and Local Jurisdiction [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Operating loss carryforwards | 10,107,000 | |||
| City Jurisdiction [Member] | ||||
| Operating Loss Carryforwards [Line Items] | ||||
| Operating loss carryforwards | $ 8,274,000 |