Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021	Nov. 30, 2021
Revenue from external customers	$ 8,140,253	$ 6,591,829	$ 21,028,673	$ 17,702,628
Income (loss) from operations	430,807	160,204	314,787	(59,537)
Total Assets	24,721,073		24,721,073		$ 20,854,048
Capital expenditures			1,187,793	487,515
Depreciation & Amortization			546,642	453,697
Operating Segments [Member]
Revenue from external customers	8,140,000	6,592,000	21,029,000	17,703,000
Income (loss) from operations	431,000	160,000	315,000	(60,000)
Income (loss) before tax	301,000	72,000	8,000	(247,000)
Total Assets	24,721,000	21,255,000	24,721,000	21,255,000
Capital expenditures	677,000	169,000	1,188,000	488,000
Depreciation & Amortization	196,000	145,000	547,000	454,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	6,345,000	4,660,000	15,823,000	12,017,000
Income (loss) from operations	676,000	95,000	994,000	85,000
Income (loss) before tax	566,000	26,000	746,000	(48,000)
Total Assets	18,328,000	14,981,000	18,328,000	14,981,000
Capital expenditures	506,000	153,000	981,000	463,000
Depreciation & Amortization	124,000	85,000	342,000	271,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	1,131,000	1,313,000	3,208,000	3,798,000
Income (loss) from operations	(176,000)	89,000	(484,000)	(97,000)
Income (loss) before tax	(181,000)	82,000	(504,000)	(118,000)
Total Assets	3,608,000	3,701,000	3,608,000	3,701,000
Capital expenditures	118,000	11,000	143,000	20,000
Depreciation & Amortization	33,000	27,000	101,000	83,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	664,000	619,000	1,998,000	1,888,000
Income (loss) from operations	(69,000)	(24,000)	(195,000)	(48,000)
Income (loss) before tax	(84,000)	(36,000)	(234,000)	(81,000)
Total Assets	2,785,000	2,573,000	2,785,000	2,573,000
Capital expenditures	53,000	5,000	64,000	5,000
Depreciation & Amortization	$ 39,000	$ 33,000	$ 104,000	$ 100,000