XML 16 R61.htm IDEA: XBRL DOCUMENT
v3.19.2

Note 15 - Concentration of Credit Risk (Details Textual) - USD ($) | Jul. 31, 2019 | Jul. 31, 2018
--- | --- | ---
Cash, Uninsured Amount | $ 737,000 | $ 899,000

X
- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
Name: | us-gaap_CashUninsuredAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant