Note 16 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Revenue from external customers		$ 5,365,536	$ 4,421,168
Income (loss) from operations		(308,721)	(352,433)
Total Assets		23,391,311		$ 24,379,833
Capital expenditures		64,401	195,020
Depreciation & Amortization		189,654	170,789
Operating Segments [Member]
Revenue from external customers	[1]	5,365,000	4,421,000
Income (loss) from operations	[1]	(309,000)	(353,000)
Income (loss) before tax	[1]	(306,000)	(364,000)
Total Assets	[1]	21,961,000	24,569,000
Capital expenditures	[1]	64,000	195,000
Depreciation & Amortization	[1]	190,000	171,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers		3,929,000	3,368,000
Income (loss) from operations		(275,000)	(220,000)
Income (loss) before tax		(270,000)	(217,000)
Total Assets		16,246,000	19,063,000
Capital expenditures		29,000	129,000
Depreciation & Amortization		133,000	125,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers		739,000	388,000
Income (loss) from operations		(60,000)	(154,000)
Income (loss) before tax		(52,000)	(158,000)
Total Assets		3,154,000	2,849,000
Capital expenditures		35,000
Depreciation & Amortization		25,000	15,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers		697,000	665,000
Income (loss) from operations		26,000	21,000
Income (loss) before tax		16,000	11,000
Total Assets		2,561,000	2,657,000
Capital expenditures			66,000
Depreciation & Amortization		$ 32,000	$ 31,000

[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.