Note 4 - Disaggregation of Revenue - Disaggregated Revenue From External Customers (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
Revenue	$ 8,117,000	$ 7,476,000	$ 23,429,000	$ 19,031,000
Agricultural Products [Member]
Revenue	5,530,000	6,345,000	17,343,000	15,823,000
Modular Buildings [Member]
Revenue	2,587,000	1,131,000	6,086,000	3,208,000
Farm Equipment [Member]
Revenue	4,581,000	5,610,000	14,804,000	13,655,000
Farm Equipment [Member] | Agricultural Products [Member]
Revenue	4,581,000	5,610,000	14,804,000	13,655,000
Farm Equipment [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Farm Equipment Service Parts [Member]
Revenue	846,000	594,000	2,255,000	1,828,000
Farm Equipment Service Parts [Member] | Agricultural Products [Member]
Revenue	846,000	594,000	2,255,000	1,828,000
Farm Equipment Service Parts [Member] | Modular Buildings [Member]
Revenue	0	0	0	0
Modular Buildings [Member]
Revenue	2,547,000	1,095,000	5,950,000	3,103,000
Modular Buildings [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	2,547,000	1,095,000	5,950,000	3,103,000
Modular Buildings Lease Income [Member]
Revenue	20,000	0	85,000	0
Modular Buildings Lease Income [Member] | Agricultural Products [Member]
Revenue	0	0	0	0
Modular Buildings Lease Income [Member] | Modular Buildings [Member]
Revenue	20,000	0	85,000	0
Product and Service, Other [Member]
Revenue	123,000	177,000	335,000	445,000
Product and Service, Other [Member] | Agricultural Products [Member]
Revenue	103,000	141,000	284,000	340,000
Product and Service, Other [Member] | Modular Buildings [Member]
Revenue	$ 20,000	$ 36,000	$ 51,000	$ 105,000