Note 18 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended			9 Months Ended
		Aug. 31, 2025		Aug. 31, 2024	Aug. 31, 2025		Aug. 31, 2024	Nov. 30, 2024
Sales		$ 6,432,296		$ 5,875,700	$ 17,909,941		$ 18,329,363
Gross profit		1,766,165		1,700,125	5,322,451		5,080,402
Operating Expense		1,421,436		1,546,431	4,464,583		5,138,020
Income (loss) from operations		344,729		153,694	857,868		(57,618)
Income tax expense (benefit)		67,147		(2,713)	446,304		(116,131)
Total Assets		21,815,740			21,815,740			$ 21,240,684
Depreciation & Amortization					593,954		663,828
Interest expense		83,668		150,012	259,022		471,784
Engineering		87,339		78,949	256,684		346,373
Selling		350,771		380,797	1,136,650		1,241,187
General and administrative (G&A)		983,326		1,086,685	3,071,249		3,550,460
Capital expenditures					474,770		614,367
Operating Segments [Member]
Sales	[1]	6,432,000		5,876,000	17,910,000		18,329,000
Gross profit	[1]	1,766,000		1,700,000	5,322,000		5,080,000
Operating Expense	[1]	1,421,000		1,546,000	4,465,000		5,138,000
Income (loss) from operations	[1]	345,000		154,000	858,000		(58,000)
Income (loss) before tax	[1]	321,000		0	2,127,000		(543,000)
Income tax expense (benefit)	[1]	67,000		(3,000)	446,000		(116,000)
Total Assets	[1]	21,816,000		22,447,000	21,816,000		22,447,000
Capital expenditures	[1]	306,000	[2]	102,000
Depreciation & Amortization	[1]	195,000		229,000	593,000		664,000
Interest expense	[1]	84,000		150,000
Engineering	[1]	87,000		79,000	257,000		347,000
Selling	[1]	351,000		381,000	1,137,000		1,242,000
General and administrative (G&A)	[1]	983,000		1,086,000	3,071,000		3,549,000
Capital expenditures	[1]				572,000	[2]	614,000
Interest expense	[1]				259,000		471,000
Corporate expense (included in G&A)	[1]				460,000		576,000
Operating Segments [Member] | Agricultural Products [Member]
Sales		2,983,000		2,988,000	9,956,000		11,779,000
Gross profit		546,000		814,000	2,428,000		3,278,000
Operating Expense		1,029,000		1,287,000	3,340,000		4,336,000
Income (loss) from operations		(483,000)		(472,000)	(911,000)		(1,057,000)
Income (loss) before tax		(491,000)		(618,000)	176,000		(1,516,000)
Income tax expense (benefit)		(103,000)		(130,000)	37,000		(318,000)
Total Assets		18,323,000		19,311,000	18,323,000		19,311,000
Capital expenditures		218,000	[2]	50,000
Depreciation & Amortization		150,000		163,000	445,000		472,000
Interest expense		68,000		140,000
Engineering		87,000		79,000	257,000		346,000
Selling		199,000		303,000	666,000		1,010,000
General and administrative (G&A)		743,000		905,000	2,417,000		2,980,000
Capital expenditures					419,000	[2]	438,000
Interest expense					214,000		443,000
Corporate expense (included in G&A)					325,000		486,000
Operating Segments [Member] | Modular Buildings [Member]
Sales		3,449,000		2,888,000	7,954,000		6,550,000
Gross profit		1,220,000		886,000	2,894,000		1,802,000
Operating Expense		392,000		259,000	1,125,000		802,000
Income (loss) from operations		828,000		626,000	1,769,000		999,000
Income (loss) before tax		812,000		618,000	1,951,000		973,000
Income tax expense (benefit)		170,000		127,000	409,000		202,000
Total Assets		3,493,000		3,136,000	3,493,000		3,136,000
Capital expenditures		88,000	[2]	52,000
Depreciation & Amortization		45,000		66,000	148,000		192,000
Interest expense		16,000		10,000
Engineering		0		0	0		1,000
Selling		152,000		78,000	471,000		232,000
General and administrative (G&A)		240,000		181,000	654,000		569,000
Capital expenditures					153,000	[2]	176,000
Interest expense					45,000		28,000
Corporate expense (included in G&A)					$ 135,000		$ 90,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Operating Expense	[1]	130,000		192,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Agricultural Products [Member]
Operating Expense		85,000		162,000
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Modular Buildings [Member]
Operating Expense		$ 45,000		$ 30,000

[1] The consolidated total in the tables is a sum of segment figures and may not tie to actual figures in the condensed consolidated financial statements due to rounding.

[2] Includes $45,000 of Right of Use Assets acquired in the Agricultural Products Segment.