Note 13 - Sales-type Leases - Components Related to Sales-type Leases (Details) - USD ($)	Feb. 28, 2021	Nov. 30, 2020
Minimum lease receivable, current	$ 14,502	$ 29,002
Unearned interest income, current	(219)	(650)
Net investment in sales-type leases, current	$ 14,283	$ 28,352

Amount of net investment in sales-type and direct financing lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919306-209978

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919308-209978

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant