Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Revenue from external customers	$ 20,715,080	$ 21,557,649
Income (loss) from operations	(1,722,042)	(431,447)
Total Assets	24,379,833	27,242,590
Capital expenditures	513,614	274,089
Depreciation & Amortization	702,349	671,967
Operating Segments [Member]
Revenue from external customers	20,715,000	21,558,000
Income (loss) from operations	(1,722,000)	(431,000)
Income (loss) before tax	(1,793,000)	(522,000)
Total Assets	22,952,000	25,488,000
Capital expenditures	514,000	274,000
Depreciation & Amortization	702,000	672,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	15,407,000	15,756,000
Income (loss) from operations	(1,381,000)	(378,000)
Income (loss) before tax	(1,371,000)	(403,000)
Total Assets	17,237,000	20,292,000
Capital expenditures	303,000	212,000
Depreciation & Amortization	506,000	487,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	2,700,000	3,674,000
Income (loss) from operations	(313,000)	88,000
Income (loss) before tax	(349,000)	70,000
Total Assets	3,108,000	2,588,000
Capital expenditures	121,000
Depreciation & Amortization	69,000	61,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	2,608,000	2,128,000
Income (loss) from operations	(28,000)	(141,000)
Income (loss) before tax	(73,000)	(189,000)
Total Assets	2,607,000	2,608,000
Capital expenditures	90,000	62,000
Depreciation & Amortization	$ 127,000	$ 124,000