Note 13 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended		6 Months Ended
		May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016	Nov. 30, 2016
Total Assets		$ 27,268,754		$ 27,268,754		$ 27,242,590
Capital expenditures				293,919	$ 61,225
Depreciation & Amortization				342,387	352,091
Revenue from external customers		4,689,354	$ 5,297,970	9,110,522	11,010,651
Income (loss) from operations		(721,384)	63,565	(1,073,816)	284,538
Operating Segments [Member]
Total Assets	[1]	25,545,000	25,689,000	25,545,000	25,689,000
Capital expenditures	[1]	99,000	35,000	294,000	62,000
Depreciation & Amortization	[1]	172,000	179,000	342,000	352,000
Revenue from external customers	[1]	4,689,000	5,298,000	9,110,000	11,011,000
Income (loss) from operations	[1]	(721,000)	64,000	(1,075,000)	285,000
Income (loss) before tax	[1]	(737,000)	30,000	(1,102,000)	226,000
Operating Segments [Member] | Agricultural Products [Member]
Total Assets	[1]	19,443,000	20,415,000	19,443,000	20,415,000
Capital expenditures	[1]	75,000	25,000	204,000	29,000
Depreciation & Amortization	[1]	126,000	132,000	251,000	260,000
Revenue from external customers	[1]	3,162,000	3,567,000	6,530,000	7,765,000
Income (loss) from operations	[1]	(657,000)	(96,000)	(877,000)	152,000
Income (loss) before tax	[1]	(647,000)	(118,000)	(865,000)	115,000
Operating Segments [Member] | Modular Buildings [Member]
Total Assets	[1]	3,400,000	2,626,000	3,400,000	2,626,000
Capital expenditures	[1]
Depreciation & Amortization	[1]	14,000	16,000	28,000	31,000
Revenue from external customers	[1]	888,000	1,250,000	1,276,000	2,193,000
Income (loss) from operations	[1]	(19,000)	203,000	(173,000)	212,000
Income (loss) before tax	[1]	(34,000)	199,000	(192,000)	206,000
Operating Segments [Member] | Tools [Member]
Total Assets	[1]	2,702,000	2,648,000	2,702,000	2,648,000
Capital expenditures	[1]	24,000	10,000	90,000	33,000
Depreciation & Amortization	[1]	32,000	31,000	63,000	61,000
Revenue from external customers	[1]	639,000	481,000	1,304,000	1,053,000
Income (loss) from operations	[1]	(45,000)	(43,000)	(25,000)	(79,000)
Income (loss) before tax	[1]	$ (56,000)	$ (51,000)	$ (45,000)	$ (95,000)

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