Note 16 - Segment Information - Segment Reporting Information (Details) - USD ($)		3 Months Ended		6 Months Ended
		May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017	Nov. 30, 2017
Revenue from external customers		$ 5,294,464	$ 4,689,354	$ 10,660,000	$ 9,110,522
Income (loss) from operations		(458,114)	(721,384)	(766,835)	(1,073,816)
Total Assets		22,593,658		22,593,658		$ 24,379,833
Capital expenditures				164,874	293,919
Depreciation & Amortization				408,757	342,387
Operating Segments [Member]
Revenue from external customers	[1]	5,295,000	4,689,000	10,660,000	9,111,000
Income (loss) from operations	[1]	(459,000)	(721,000)	(766,000)	(1,074,000)
Income (loss) before tax	[1]	(780,000)	(737,000)	(1,086,000)	(1,102,000)
Total Assets	[1]	22,594,000	25,545,000	22,594,000	25,545,000
Capital expenditures	[1]	901,000	99,000	965,000	294,000
Depreciation & Amortization	[1]	169,500	172,000	409,000	342,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers		3,937,000	3,162,000	7,866,000	6,531,000
Income (loss) from operations		(263,000)	(657,000)	(537,000)	(876,000)
Income (loss) before tax		(576,000)	(647,000)	(845,000)	(865,000)
Total Assets		16,688,000	19,443,000	16,688,000	19,443,000
Capital expenditures		42,000	75,000	71,000	204,000
Depreciation & Amortization		132,000	126,000	265,000	251,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers		834,000	888,000	1,573,000	1,276,000
Income (loss) from operations		(146,000)	(19,000)	(206,000)	(173,000)
Income (loss) before tax		(141,000)	(34,000)	(194,000)	(192,000)
Total Assets		3,486,000	3,400,000	3,486,000	3,400,000
Capital expenditures		859,000		894,000
Depreciation & Amortization		5,500	14,000	80,000	28,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers		524,000	639,000	1,221,000	1,304,000
Income (loss) from operations		(50,000)	(45,000)	(23,000)	(25,000)
Income (loss) before tax		(63,000)	(56,000)	(47,000)	(45,000)
Total Assets		2,420,000	2,702,000	2,420,000	2,702,000
Capital expenditures			24,000		90,000
Depreciation & Amortization		$ 32,000	$ 32,000	$ 64,000	$ 63,000

[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.