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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jan. 31, 2021
Accounting Policies [Abstract] |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
| January 31, 2021
| Carrying Value |  | Estimated Fair Value
6.25% Notes | $ | 600,000 |  |  | $ | 639,984 |
0.0% Convertible Notes | $ | 467,758 |  |  | $ | 580,762 |
EPR Secured Notes | $ | 136,512 |  |  | $ | 181,810 |
EB-5 Development Notes | $ | 49,127 |  |  | $ | 50,277 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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