Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Nov. 30, 2018
Revenue from external customers	$ 5,747,256	$ 5,294,464	$ 9,871,482	$ 10,660,000
Income (loss) from operations	(369,513)	(458,114)	(1,092,136)	(766,835)
Total Assets	21,359,005		21,359,005		$ 21,325,474
Capital expenditures			186,215	164,874
Depreciation & Amortization			549,333	408,757
Operating Segments [Member]
Revenue from external customers	5,747,000	5,294,000	9,871,000	10,660,000
Income (loss) from operations	(370,000)	(458,000)	(1,092,000)	(767,000)
Income (loss) before tax	(459,000)	(780,000)	(1,240,000)	(1,085,000)
Total Assets	21,359,000	22,590,000	21,359,000	22,590,000
Capital expenditures	133,000	901,000	186,000	965,000
Depreciation & Amortization	260,000	169,500	549,000	409,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	3,637,000	3,937,000	6,247,000	7,866,000
Income (loss) from operations	(297,000)	(263,000)	(898,000)	(537,000)
Income (loss) before tax	(382,000)	(576,000)	(1,031,000)	(845,000)
Total Assets	14,730,000	16,686,000	14,730,000	16,686,000
Capital expenditures	76,000	42,000	110,000	71,000
Depreciation & Amortization	124,000	132,000	249,000	265,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	1,558,000	834,000	2,580,000	1,573,000
Income (loss) from operations	(63,000)	(146,000)	(161,000)	(206,000)
Income (loss) before tax	(56,000)	(141,000)	(155,000)	(194,000)
Total Assets	4,127,000	3,485,000	4,127,000	3,485,000
Capital expenditures	30,000	859,000	48,000	894,000
Depreciation & Amortization	104,000	5,500	236,000	80,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	552,000	523,000	1,044,000	1,221,000
Income (loss) from operations	(10,000)	(49,000)	(33,000)	(24,000)
Income (loss) before tax	(21,000)	(63,000)	(54,000)	(46,000)
Total Assets	2,502,000	2,419,000	2,502,000	2,419,000
Capital expenditures	27,000		28,000
Depreciation & Amortization	$ 32,000	$ 32,000	$ 64,000	$ 64,000