Note 5 - Contract Receivables, Contract Assets and Contract Liabilities - Contract With Customers (Details) - USD ($) |
Aug. 31, 2026 |
Nov. 30, 2025 |
Dec. 01, 2024 |
|---|---|---|---|
| Receivables | $ 5,071,000 | $ 2,202,000 | $ 2,373,000 |
| Assets (cost and profit in excess of billings) | 69,000 | 380,000 | 213,000 |
| Liabilities (billings in excess of profit and customer deposits) | $ 3,627,000 | $ 520,000 | $ 2,110,000 |
| X | ||||||||||
- Definition Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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