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Note 1 - Summary of Significant Account Policies (Details) (USD $) | 12 Months Ended
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Nov. 30, 2013 | Nov. 30, 2012
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Overdue Trade Receivables, Interest Rate, Percent of Account Balances Per Month | 1.50% |
Finite-Lived Intangible Asset, Useful Life | 5 years |
Sales Revenue, Goods, Gross | $ 788,000 | $ 937,000
Research and Development Expense | 174,000 | 125,000
Advertising Expense | $ 479,000 | $ 256,000
Modular Buildings [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Concentration Risk, Percentage |  | 25.00%
Agricultural Products [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Concentration Risk, Percentage |  | 12.00%
Assets Leased to Others [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Customer Concentration Risk [Member] | Maximum [Member] | Sales Revenue, Net [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Concentration Risk, Percentage | 6.00% |
Maximum [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Property, Plant and Equipment, Useful Life | 40 years |
Minimum [Member] |  |
Note 1 - Summary of Significant Account Policies (Details) [Line Items] |  |
Property, Plant and Equipment, Useful Life | 3 years |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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