Note 3 - Disaggregation of Revenue - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Revenue	$ 5,613,000	$ 5,401,000
Farm Equipment [Member]
Revenue	3,515,000	2,777,000
Farm Equipment Service Parts [Member]
Revenue	558,000	620,000
Steel Cutting Tools and Inserts [Member]
Revenue	574,000	606,000
Modular Buildings [Member]
Revenue	851,000	1,141,000
Modular Buildings Lease Income [Member]
Revenue	0	0
Product and Service, Other [Member]
Revenue	115,000	257,000
Agricultural Products [Member]
Revenue	4,161,000	3,500,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	3,515,000	2,777,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	558,000	620,000
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	88,000	103,000
Modular Buildings [Member]
Revenue	868,000	1,291,000
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	851,000	1,141,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	17,000	150,000
Tools [Member]
Revenue	584,000	610,000
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	574,000	606,000
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	$ 10,000	$ 4,000