Note 1 - Summary of Significant Accounting Policies - Disaggregated Revenue From External Customer (Details) - USD ($)	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Revenue	$ 24,965,000	$ 22,409,000
Farm Equipment [Member]
Revenue	13,630,000	10,149,000
Farm Equipment Service Parts [Member]
Revenue	2,799,000	2,519,000
Steel Cutting Tools and Inserts [Member]
Revenue	2,440,000	2,308,000
Modular Buildings [Member]
Revenue	5,382,000	6,517,000
Modular Buildings Lease Income [Member]
Revenue	0	318,000
Product and Service, Other [Member]
Revenue	714,000	598,000
Agricultural Products [Member]
Revenue	16,826,000	13,085,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	13,630,000	10,149,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	2,799,000	2,519,000
Agricultural Products [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	0	0
Agricultural Products [Member] | Modular Buildings [Member]
Revenue	0	0
Agricultural Products [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0
Agricultural Products [Member] | Product and Service, Other [Member]
Revenue	397,000	417,000
Modular Buildings [Member]
Revenue	5,678,000	6,993,000
Modular Buildings [Member] | Farm Equipment [Member]
Revenue	0	0
Modular Buildings [Member] | Farm Equipment Service Parts [Member]
Revenue	0	0
Modular Buildings [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	0	0
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	5,382,000	6,517,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	0	318,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	296,000	158,000
Tools [Member]
Revenue	2,461,000	2,331,000
Tools [Member] | Farm Equipment [Member]
Revenue	0	0
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue	0	0
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	2,440,000	2,308,000
Tools [Member] | Modular Buildings [Member]
Revenue	0	0
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 21,000	$ 23,000