Fair Value Measurements - Additional Information (Detail) |
Oct. 31, 2019
USD ($)
|
|---|---|
| Fair Value Measurements Disclosure [Line Items] | |
| Marketable securities fair value, mature between one and three years | $ 2,500,000 |
| Fair Value, Inputs, Level 3 [Member] | |
| Fair Value Measurements Disclosure [Line Items] | |
| Fair value measurements of our financial assets | $ 0 |
| X | ||||||||||
- Definition Fair value of available for sale investments that mature between one and three years. No definition available.
|
| X | ||||||||||
- Definition Fair Value Measurements Disclosure [Line Items] No definition available.
|
| X | ||||||||||
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|