XML 128 R1.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Document and Entity Information | 12 Months Ended
--- | ---
Oct. 31, 2019
Document and Entity Information [Abstract] |
Entity Central Index Key | 0000794170
Current Fiscal Year End Date | --10-31
Document Type | 10-K
Document Fiscal Year Focus | 2019
Document Fiscal Period Focus | FY
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