Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Nov. 30, 2021
Revenue from external customers	$ 7,275,353	$ 5,710,228	$ 12,888,420	$ 11,110,800
Income (loss) from operations	321,093	148,781	(115,784)	(219,742)
Total Assets	24,041,744		24,041,744		$ 20,854,048
Capital expenditures			509,097	318,958
Capital expenditures			509,097	318,958
Depreciation & Amortization			350,435	308,267
Depreciation and amortization expense			350,435	308,267
Operating Segments [Member]
Revenue from external customers	7,275,000	5,710,000	12,888,000	11,111,000
Income (loss) from operations	321,000	149,000	(116,000)	(220,000)
Income (loss) before tax	222,000	81,000	(293,000)	(319,000)
Total Assets	23,907,000	20,670,000	23,907,000	20,670,000
Capital expenditures	335,000	155,000	509,000	319,000
Capital expenditures	335,000	155,000	509,000	319,000
Depreciation & Amortization	182,000	147,000	350,000	308,000
Depreciation and amortization expense	182,000	147,000	350,000	308,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	5,316,000	3,858,000	9,477,000	7,357,000
Income (loss) from operations	447,000	188,000	318,000	(9,000)
Income (loss) before tax	366,000	137,000	180,000	(76,000)
Total Assets	18,389,000	14,271,000	18,389,000	14,271,000
Capital expenditures	321,000	155,000	474,000	310,000
Capital expenditures	321,000	155,000	474,000	310,000
Depreciation & Amortization	117,000	87,000	218,000	185,000
Depreciation and amortization expense	117,000	87,000	218,000	185,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	1,209,000	1,194,000	2,077,000	2,485,000
Income (loss) from operations	(86,000)	(21,000)	(308,000)	(187,000)
Income (loss) before tax	(93,000)	(28,000)	(323,000)	(199,000)
Total Assets	2,998,000	3,725,000	2,998,000	3,725,000
Capital expenditures	10,000		24,000	9,000
Capital expenditures	10,000		24,000	9,000
Depreciation & Amortization	33,000	27,000	67,000	56,000
Depreciation and amortization expense	33,000	27,000	67,000	56,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	750,000	658,000	1,334,000	1,269,000
Income (loss) from operations	(40,000)	(18,000)	(126,000)	(24,000)
Income (loss) before tax	(51,000)	(28,000)	(150,000)	(44,000)
Total Assets	2,520,000	2,674,000	2,520,000	2,674,000
Capital expenditures	4,000		11,000	0
Capital expenditures	4,000		11,000	0
Depreciation & Amortization	32,000	33,000	65,000	67,000
Depreciation and amortization expense	$ 32,000	$ 33,000	$ 65,000	$ 67,000