Note 3 - Disaggregation of Revenue - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Revenue	$ 8,140,000	$ 6,592,000	$ 21,029,000	$ 17,703,000
Farm Equipment [Member]
Revenue	5,610,000	3,831,000	13,655,000	9,723,000
Farm Equipment Service Parts [Member]
Revenue	594,000	749,000	1,828,000	2,027,000
Steel Cutting Tools and Inserts [Member]
Revenue	652,000	613,000	1,964,000	1,872,000
Modular Buildings [Member]
Revenue	1,095,000	1,256,000	3,103,000	3,573,000
Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Product and Service, Other [Member]
Revenue	189,000	143,000	479,000	508,000
Agricultural Products [Member]
Revenue	6,345,000	4,660,000	15,823,000	12,017,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	5,610,000	3,831,000	13,655,000	9,723,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	594,000	749,000	1,828,000	2,027,000
Agricultural Products [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	0	0	0	0
Agricultural Products [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Agricultural Products [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Agricultural Products [Member] | Product and Service, Other [Member]
Revenue	141,000	80,000	340,000	267,000
Modular Buildings [Member]
Revenue	1,131,000	1,313,000	3,208,000	3,798,000
Modular Buildings [Member] | Farm Equipment [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Farm Equipment Service Parts [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	1,095,000	1,256,000	3,103,000	3,573,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	36,000	57,000	105,000	225,000
Tools [Member]
Revenue	664,000	619,000	1,998,000	1,888,000
Tools [Member] | Farm Equipment [Member]
Revenue	0	0	0	0
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue	0	0	0	0
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	652,000	613,000	1,964,000	1,872,000
Tools [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 12,000	$ 6,000	$ 34,000	$ 16,000