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Note 12 - Sales-type Leases (Details Textual) | 12 Months Ended
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Nov. 30, 2018 USD ($)
Capital Leases, Income Statement, Sales Type Lease Revenue | $ 426,542

X
- Definition Revenue realized in the period on sales type leases. + References No definition available. + Details
Name: | us-gaap_CapitalLeasesIncomeStatementSalesTypeLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration