Note 4 - Disaggregation of Revenue - Disaggregated Revenue From External Customers (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Revenue	$ 6,432,000	$ 5,876,000	$ 17,910,000	$ 18,329,000
Agricultural Products [Member]
Revenue	2,983,000	2,988,000	9,956,000	11,779,000
Modular Buildings [Member]
Revenue	3,449,000	2,888,000	7,954,000	6,550,000
Farm Equipment [Member]
Revenue	1,874,000	2,367,000	7,192,000	9,870,000
Farm Equipment [Member] | Agricultural Products [Member]
Revenue	1,874,000	2,367,000	7,192,000	9,870,000
Farm Equipment [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Farm Equipment Service Parts [Member]
Revenue	1,039,000	532,000	2,550,000	1,674,000
Farm Equipment Service Parts [Member] | Agricultural Products [Member]
Revenue	1,039,000	532,000	2,550,000	1,674,000
Farm Equipment Service Parts [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Modular Buildings [Member]
Revenue	3,438,000	2,776,000	7,783,000	6,268,000
Modular Buildings [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	3,438,000	2,776,000	7,783,000	6,268,000
Modular Buildings Lease Income [Member]
Revenue	3,000	56,000	75,000	148,000
Modular Buildings Lease Income [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings Lease Income [Member] | Modular Buildings [Member]
Revenue	3,000	56,000	75,000	148,000
Product and Service, Other [Member]
Revenue	78,000	145,000	310,000	369,000
Product and Service, Other [Member] | Agricultural Products [Member]
Revenue	70,000	89,000	214,000	235,000
Product and Service, Other [Member] | Modular Buildings [Member]
Revenue	$ 8,000	$ 56,000	$ 96,000	$ 134,000