Note 4 - Disaggregation of Revenue - Disaggregated Revenue From External Customers (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2024	Aug. 31, 2023
Revenue	$ 5,876,000	$ 8,117,000	$ 18,329,000	$ 23,429,000
Agricultural Products [Member]
Revenue	2,988,000	5,530,000	11,779,000	17,343,000
Modular Buildings [Member]
Revenue	2,888,000	2,587,000	6,550,000	6,086,000
Farm Equipment [Member]
Revenue	2,367,000	4,581,000	9,870,000	14,804,000
Farm Equipment [Member] | Agricultural Products [Member]
Revenue	2,367,000	4,581,000	9,870,000	14,804,000
Farm Equipment [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Farm Equipment Service Parts [Member]
Revenue	532,000	846,000	1,674,000	2,255,000
Farm Equipment Service Parts [Member] | Agricultural Products [Member]
Revenue	532,000	846,000	1,674,000	2,255,000
Farm Equipment Service Parts [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Modular Buildings [Member]
Revenue	2,776,000	2,547,000	6,268,000	5,950,000
Modular Buildings [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	2,776,000	2,547,000	6,268,000	5,950,000
Modular Buildings Lease Income [Member]
Revenue	56,000	20,000	148,000	85,000
Modular Buildings Lease Income [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings Lease Income [Member] | Modular Buildings [Member]
Revenue	56,000	20,000	148,000	85,000
Product and Service, Other [Member]
Revenue	145,000	123,000	369,000	335,000
Product and Service, Other [Member] | Agricultural Products [Member]
Revenue	89,000	103,000	235,000	284,000
Product and Service, Other [Member] | Modular Buildings [Member]
Revenue	$ 56,000	$ 20,000	$ 134,000	$ 51,000