Note 17 - Segment Information - Segment Reporting Information (Details) - USD ($)	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Nov. 30, 2019
Revenue from external customers	$ 5,025,924	$ 4,124,226
Income (loss) from operations	(469,696)	(722,625)
Total Assets	20,999,766		$ 19,346,938
Capital expenditures	267,141	53,056
Depreciation & Amortization	227,456	289,072
Operating Segments [Member]
Revenue from external customers	5,026,000	4,124,000
Income (loss) from operations	(470,000)	(723,000)
Income (loss) before tax	(544,000)	(780,000)
Total Assets	21,000,000	20,903,000
Capital expenditures	267,000	53,000
Depreciation & Amortization	227,000	289,000
Operating Segments [Member] | Agricultural Products [Member]
Revenue from external customers	2,953,000	2,610,000
Income (loss) from operations	(435,000)	(602,000)
Income (loss) before tax	(498,000)	(649,000)
Total Assets	13,870,000	14,852,000
Capital expenditures	241,000	34,000
Depreciation & Amortization	126,000	125,000
Operating Segments [Member] | Modular Buildings [Member]
Revenue from external customers	1,457,000	1,022,000
Income (loss) from operations	6,000	(98,000)
Income (loss) before tax	6,000	(99,000)
Total Assets	4,373,000	3,564,000
Capital expenditures	26,000	18,000
Depreciation & Amortization	68,000	132,000
Operating Segments [Member] | Tools [Member]
Revenue from external customers	616,000	492,000
Income (loss) from operations	(41,000)	(23,000)
Income (loss) before tax	(52,000)	(32,000)
Total Assets	2,757,000	2,487,000
Capital expenditures		1,000
Depreciation & Amortization	$ 33,000	$ 32,000