Note 13 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended
		Feb. 28, 2017	Feb. 29, 2016	Nov. 30, 2016
Revenue from external customers		$ 4,421,168	$ 5,712,681
Income (loss) from operations		(352,433)	220,968
Total Assets		26,292,576		$ 27,242,590
Capital Expenditures		195,020	26,257
Depreciation & Amortization		170,789	173,303
Operating Segments [Member]
Revenue from external customers	[1]	4,421,000	5,713,000
Income (loss) from operations	[1]	(352,000)	221,000
Income (loss) before tax	[1]	(365,000)	195,000
Total Assets	[1]	24,569,000	27,418,000
Capital Expenditures	[1]	195,000	26,000
Depreciation & Amortization	[1]	171,000	173,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	[1]	3,368,000	4,198,000
Income (loss) from operations	[1]	(220,000)	248,000
Income (loss) before tax	[1]	(217,000)	233,000
Total Assets	[1]	19,063,000	21,844,000
Capital Expenditures	[1]	129,000	4,000
Depreciation & Amortization	[1]	125,000	128,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	[1]	388,000	943,000
Income (loss) from operations	[1]	(154,000)	9,000
Income (loss) before tax	[1]	(158,000)	7,000
Total Assets	[1]	2,849,000	2,838,000
Capital Expenditures	[1]
Depreciation & Amortization	[1]	15,000	15,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	[1]	665,000	572,000
Income (loss) from operations	[1]	21,000	(36,000)
Income (loss) before tax	[1]	11,000	(44,000)
Total Assets	[1]	2,657,000	2,736,000
Capital Expenditures	[1]	66,000	23,000
Depreciation & Amortization	[1]	$ 31,000	$ 30,000

[1] Segment figures in the table may not sum to the consolidated total due to rounding.