Note 18 - Segment Information - Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Revenue from external customers	$ 22,889,173	$ 19,726,793
Income (loss) from operations	(1,496,881)	(3,095,270)
Total Assets	19,346,938	21,325,474
Capital expenditures	447,025	434,505
Depreciation & Amortization	1,003,541	960,606
Operating Segments [Member]
Revenue from external customers	22,889,000	19,727,000
Income (loss) from operations	(1,497,000)	(3,095,000)
Income (loss) before tax	(1,769,000)	(3,847,000)
Total Assets	19,347,000	21,325,000
Capital expenditures	447,000	435,000
Depreciation & Amortization	1,004,000	961,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	13,508,000	14,344,000
Income (loss) from operations	(1,599,000)	(2,462,000)
Income (loss) before tax	(1,843,000)	(3,206,000)
Total Assets	13,169,000	15,458,000
Capital expenditures	257,000	321,000
Depreciation & Amortization	503,000	516,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	7,260,000	3,109,000
Income (loss) from operations	208,000	(566,000)
Income (loss) before tax	220,000	(530,000)
Total Assets	3,584,000	3,401,000
Capital expenditures	147,000	4,000
Depreciation & Amortization	372,000	317,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	2,121,000	2,274,000
Income (loss) from operations	(106,000)	(67,000)
Income (loss) before tax	(146,000)	(111,000)
Total Assets	2,594,000	2,466,000
Capital expenditures	43,000	110,000
Depreciation & Amortization	$ 129,000	$ 128,000