Note 16 - Segment Information - Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Revenues, Total	$ 22,409,123	$ 22,889,173
Income (loss) from operations	(3,909,634)	(1,496,881)
Total Assets	18,803,013	19,346,938
Capital expenditures	693,414	447,025
Depreciation, Depletion and Amortization, Total	818,234	1,003,541
Operating Segments [Member]
Revenues, Total	22,409,000	22,889,000
Income (loss) from operations	(3,910,000)	(1,497,000)
Income (loss) before tax	(2,960,000)	(1,769,000)
Total Assets	18,803,000	19,347,000
Capital expenditures	693,000	447,000
Depreciation, Depletion and Amortization, Total	818,000	1,004,000
Operating Segments [Member] | Agricultural Products [Member]
Revenues, Total	13,085,000	13,508,000
Income (loss) from operations	(2,318,000)	(1,599,000)
Income (loss) before tax	(1,723,000)	(1,843,000)
Total Assets	12,785,000	13,169,000
Capital expenditures	499,000	257,000
Depreciation, Depletion and Amortization, Total	481,000	503,000
Operating Segments [Member] | Modular Buildings [Member]
Revenues, Total	6,993,000	7,260,000
Income (loss) from operations	(1,295,000)	208,000
Income (loss) before tax	(1,058,000)	220,000
Total Assets	3,310,000	3,584,000
Capital expenditures	146,000	147,000
Depreciation, Depletion and Amortization, Total	205,000	372,000
Operating Segments [Member] | Tools [Member]
Revenues, Total	2,331,000	2,121,000
Income (loss) from operations	(297,000)	(106,000)
Income (loss) before tax	(179,000)	(146,000)
Total Assets	2,708,000	2,594,000
Capital expenditures	48,000	43,000
Depreciation, Depletion and Amortization, Total	$ 132,000	$ 129,000