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Note 14 - Custodial Risk (Details Textual) | Sep. 30, 2018 USD ($)
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Cash, Uninsured Amount | $ 3,000,000

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