Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Nov. 30, 2019
Revenue from external customers	$ 5,445,732	$ 5,747,256	$ 10,471,656	$ 9,871,482
Income (loss) from operations	(924,616)	(369,513)	(1,394,313)	(1,092,136)
Total Assets	20,379,611		20,379,611		$ 19,346,938
Capital expenditures			412,294	186,215
Depreciation & Amortization			459,436	549,333
Operating Segments [Member]
Revenue from external customers	5,446,000	5,747,000	10,472,000	9,871,000
Income (loss) from operations	(925,000)	(370,000)	(1,394,000)	(1,092,000)
Income (loss) before tax	(997,000)	(459,000)	(1,541,000)	(1,240,000)
Total Assets	20,380,000	21,359,000	20,380,000	21,359,000
Capital expenditures	141,000	133,000	412,000	186,000
Depreciation & Amortization	231,000	260,000	459,000	549,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	3,071,000	3,637,000	6,023,000	6,247,000
Income (loss) from operations	(722,000)	(297,000)	(1,156,000)	(898,000)
Income (loss) before tax	(784,000)	(382,000)	(1,282,000)	(1,031,000)
Total Assets	13,948,000	14,730,000	13,948,000	14,730,000
Capital expenditures	56,000	76,000	298,000	110,000
Depreciation & Amortization	127,000	124,000	254,000	249,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	1,799,000	1,558,000	3,256,000	2,580,000
Income (loss) from operations	(124,000)	(63,000)	(118,000)	(161,000)
Income (loss) before tax	(126,000)	(56,000)	(120,000)	(156,000)
Total Assets	3,772,000	4,127,000	3,772,000	4,127,000
Capital expenditures	85,000	30,000	111,000	48,000
Depreciation & Amortization	71,000	104,000	139,000	236,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	576,000	552,000	1,193,000	1,044,000
Income (loss) from operations	(79,000)	(10,000)	(120,000)	(33,000)
Income (loss) before tax	(87,000)	(21,000)	(139,000)	(53,000)
Total Assets	2,660,000	2,502,000	2,660,000	2,502,000
Capital expenditures		27,000	3,000	28,000
Depreciation & Amortization	$ 33,000	$ 32,000	$ 66,000	$ 64,000