Note 5 - Contract Receivables, Contract Assets and Contract Liabilities (Details Textual) - USD ($) |
9 Months Ended | |||
|---|---|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
Nov. 30, 2025 |
Dec. 01, 2024 |
|
| Contract with Customer, Liability, Revenue Recognized | $ 422,000 | $ 255,000 | ||
| Construction Contractor, Receivable, Excluding Contract Retainage | 5,071,000 | $ 2,202,000 | $ 2,373,000 | |
| Contract with Customer, Asset, after Allowance for Credit Loss | 69,000 | 380,000 | 213,000 | |
| Contract with Customer, Liability | $ 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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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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