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OTHER BALANCE SHEET DETAILS - Deferred Revenue (Details) - USD ($) $ in Thousands | Jul. 31, 2021 | Oct. 31, 2020
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Disaggregation of Revenue [Line Items] |  |
Deferred revenue | $ 183,899 | $ 158,363
Less current portion | (126,179) | (108,700)
Long-term deferred revenue | 57,720 | 49,663
Products |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue | 13,380 | 17,534
Services |  |
Disaggregation of Revenue [Line Items] |  |
Deferred revenue | $ 170,519 | $ 140,829

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