Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended
		Feb. 28, 2019	Feb. 28, 2018	Nov. 30, 2018
Revenue from external customers		$ 4,124,226	$ 5,365,536
Income (loss) from operations		(722,625)	(308,721)
Total Assets		20,902,608		$ 21,325,474
Capital expenditures		53,056	64,401
Depreciation & Amortization		289,072	189,654
Operating Segments [Member]
Revenue from external customers	[1]	4,124,000	5,366,000
Income (loss) from operations		(722,000)	(309,000)
Income (loss) before tax		(780,000)	(306,000)
Total Assets	[1]	20,903,000	21,961,000
Capital expenditures	[1]	53,000	64,000
Depreciation & Amortization	[1]	289,000	190,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers		2,610,000	3,930,000
Income (loss) from operations		(601,000)	(275,000)
Income (loss) before tax		(649,000)	(270,000)
Total Assets		14,852,000	16,246,000
Capital expenditures		34,000	29,000
Depreciation & Amortization		125,000	133,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers		1,022,000	739,000
Income (loss) from operations		(98,000)	(60,000)
Income (loss) before tax		(99,000)	(52,000)
Total Assets		3,564,000	3,154,000
Capital expenditures		18,000	35,000
Depreciation & Amortization		132,000	25,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers		492,000	697,000
Income (loss) from operations		(23,000)	26,000
Income (loss) before tax		(32,000)	16,000
Total Assets		2,487,000	2,561,000
Capital expenditures		1,000
Depreciation & Amortization		$ 32,000	$ 32,000

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