Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Revenue from external customers	$ 21,557,649	$ 26,326,150
Income (loss) from operations	(431,447)	(76,812)
Total Assets	27,242,590	31,331,608
Capital expenditures	274,089	238,923
Depreciation & Amortization	671,967	821,990
Operating Segments [Member]
Revenue from external customers	21,558,000	26,326,000
Income (loss) from operations	(431,000)	(77,000)
Income (loss) before tax	(522,000)	(511,000)
Total Assets	25,513,000	28,767,000
Capital expenditures	274,000	239,000
Depreciation & Amortization	672,000	822,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	15,756,000	20,756,000
Income (loss) from operations	(378,000)	(84,000)
Income (loss) before tax	(403,000)	(438,000)
Total Assets	20,317,000	22,696,000
Capital expenditures	212,000	219,000
Depreciation & Amortization	487,000	585,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	3,674,000	3,191,000
Income (loss) from operations	88,000	150,000
Income (loss) before tax	70,000	124,000
Total Assets	2,588,000	3,181,000
Capital expenditures		9,000
Depreciation & Amortization	61,000	125,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	2,128,000	2,379,000
Income (loss) from operations	(141,000)	(143,000)
Income (loss) before tax	(189,000)	(197,000)
Total Assets	2,608,000	2,890,000
Capital expenditures	62,000	11,000
Depreciation & Amortization	$ 124,000	$ 119,000