Note 1 - Summary of Significant Accounting Policies - Disaggregated Revenue From External Customer (Details) - USD ($)	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Revenue	$ 22,409,000	$ 22,889,000
Farm Equipment [Member]
Revenue	10,149,000	10,435,000
Farm Equipment Service Parts [Member]
Revenue	2,519,000	2,638,000
Steel Cutting Tools and Inserts [Member]
Revenue	2,308,000	2,086,000
Modular Buildings [Member]
Revenue	6,517,000	6,460,000
Modular Buildings Lease Income [Member]
Revenue	318,000	674,000
Product and Service, Other [Member]
Revenue	598,000	596,000
Agricultural Products [Member]
Revenue	13,085,000	13,508,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	10,149,000	10,435,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	2,519,000	2,638,000
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	417,000	435,000
Modular Buildings [Member]
Revenue	6,993,000	7,260,000
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	6,517,000	6,460,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	318,000	674,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	158,000	126,000
Tools [Member]
Revenue	2,331,000	2,121,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	2,308,000	2,086,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 23,000	$ 35,000