Note 16 - Segment Information - Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Revenues, Total	$ 24,965,086	$ 22,409,123
Income (loss) from operations	523,408	(3,909,634)
Total Assets	20,854,048	18,803,013
Capital expenditures	620,284	693,414
Depreciation, Depletion and Amortization, Total	613,409	818,234
Operating Segments [Member]
Revenues, Total	24,965,000	22,409,000
Income (loss) from operations	523,000	(3,910,000)
Income (loss) before tax	267,000	(2,960,000)
Total Assets	20,854,000	18,803,000
Capital expenditures	820,000	693,000
Depreciation, Depletion and Amortization, Total	613,000	818,000
Operating Segments [Member] | Agricultural Products [Member]
Revenues, Total	16,826,000	13,085,000
Income (loss) from operations	599,000	(2,318,000)
Income (loss) before tax	413,000	(1,723,000)
Total Assets	14,950,000	12,785,000
Capital expenditures	726,000	499,000
Depreciation, Depletion and Amortization, Total	366,000	481,000
Operating Segments [Member] | Modular Buildings [Member]
Revenues, Total	5,678,000	6,993,000
Income (loss) from operations	74,000	(1,295,000)
Income (loss) before tax	45,000	(1,058,000)
Total Assets	3,429,000	3,310,000
Capital expenditures	94,000	146,000
Depreciation, Depletion and Amortization, Total	111,000	205,000
Operating Segments [Member] | Tools [Member]
Revenues, Total	2,461,000	2,331,000
Income (loss) from operations	(150,000)	(297,000)
Income (loss) before tax	(191,000)	(179,000)
Total Assets	2,475,000	2,708,000
Capital expenditures	0	48,000
Depreciation, Depletion and Amortization, Total	$ 136,000	$ 132,000