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Note 4 - Contract Receivables, Contract Assets and Contract Liabilities (Tables) | 6 Months Ended
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May 31, 2020
Notes Tables |
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | May 31, 2020 |  |  | November 30, 2019 |
Receivables |  | $ | 660,000 |  |  | $ | 115,000 |
Assets |  |  | 162,000 |  |  |  | 727,000 |
Liabilities |  | $ | 365,000 |  |  | $ | 89,000 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration