The Tax Cuts and Jobs Act (Details) - USD ($) $ in Millions |
1 Months Ended | 9 Months Ended | |
|---|---|---|---|
Dec. 22, 2017 |
Apr. 30, 2019 |
Apr. 30, 2018 |
|
| The Tax Cuts and Jobs Act (Textual) | |||
| U.S. federal statutory corporate tax rate | 26.90% | ||
| U.S. federal statutory tax rate, thereafter | 21.00% | ||
| Federal net operating loss carryforwards | $ 11 | $ 12 | |
| Minimum [Member] | |||
| The Tax Cuts and Jobs Act (Textual) | |||
| U.S. federal statutory corporate tax rate | 21.00% | ||
| Maximum [Member] | |||
| The Tax Cuts and Jobs Act (Textual) | |||
| U.S. federal statutory corporate tax rate | 35.00% |