Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021
Revenue from external customers	$ 5,613,066	$ 5,400,572
Income (loss) from operations	(436,876)	(368,523)
Total Assets	20,851,723		$ 20,854,048
Capital expenditures	174,133	163,927
Depreciation & Amortization	167,542	161,107
Operating Segments [Member]
Revenue from external customers	5,613,000	5,401,000
Income (loss) from operations	(437,000)	(369,000)
Income (loss) before tax	(515,000)	(400,000)
Total Assets	20,852,000	18,782,000
Capital expenditures	174,000	164,000
Depreciation & Amortization	168,000	161,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	4,161,000	3,500,000
Income (loss) from operations	(129,000)	(198,000)
Income (loss) before tax	(186,000)	(212,000)
Total Assets	15,784,000	12,990,000
Capital expenditures	153,000	155,000
Depreciation & Amortization	101,000	99,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	868,000	1,291,000
Income (loss) from operations	(223,000)	(165,000)
Income (loss) before tax	(230,000)	(172,000)
Total Assets	2,695,000	3,171,000
Capital expenditures	14,000	9,000
Depreciation & Amortization	34,000	29,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	584,000	610,000
Income (loss) from operations	(85,000)	(6,000)
Income (loss) before tax	(99,000)	(16,000)
Total Assets	2,373,000	2,621,000
Capital expenditures	7,000	0
Depreciation & Amortization	$ 33,000	$ 33,000