Note 3 - Revenue Recognition - Disaggregated Revenue from External Customer (Details) - USD ($)	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Revenue	$ 4,124,000	$ 5,366,000
Farm Equipment [Member]
Revenue	2,092,000	3,253,000
Farm Equipment Service Parts [Member]
Revenue	460,000	586,000
Steel Cutting Tools and Inserts [Member]
Revenue	484,000	688,000
Modular Buildings [Member]
Revenue	795,000	674,000
Modular Buildings Lease Income [Member]
Revenue	179,000	49,000
Product and Service, Other [Member]
Revenue	114,000	116,000
Agricultural Products [Member]
Revenue	2,610,000	3,930,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	2,092,000	3,253,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	460,000	586,000
Agricultural Products [Member] | Steel Cutting Tools and Inserts [Member]
Revenue
Agricultural Products [Member] | Modular Buildings [Member]
Revenue
Agricultural Products [Member] | Modular Buildings Lease Income [Member]
Revenue
Agricultural Products [Member] | Product and Service, Other [Member]
Revenue	58,000	91,000
Modular Buildings [Member]
Revenue	1,022,000	739,000
Modular Buildings [Member] | Farm Equipment [Member]
Revenue
Modular Buildings [Member] | Farm Equipment Service Parts [Member]
Revenue
Modular Buildings [Member] | Steel Cutting Tools and Inserts [Member]
Revenue
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	795,000	674,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	179,000	49,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	48,000	16,000
Tools [Member]
Revenue	492,000	697,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	484,000	688,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 8,000	$ 9,000