Note 1 - Summary of Significant Accounting Policies - Components Related to Sales-type Leases (Details) - USD ($)	Nov. 30, 2021	Nov. 30, 2020
Minimum lease receivable, current		$ 29,002
Unearned interest income, current		(650)
Net investment in sales-type leases, current	$ 0	$ 28,352

Amount, before allowance for credit loss, of net investment in sales-type and direct financing leases, 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=123420820&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=123420820&loc=SL77919308-209978

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant