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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% |  |

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- Definition Amount of federal net operating loss carryforwards used to offset transition tax. + References No definition available. + Details
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