Note 3 - Disaggregation of Revenue - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Revenue	$ 7,275,000	$ 5,710,000	$ 12,888,000	$ 11,111,000
Farm Equipment [Member]
Revenue	4,530,000	3,115,000	8,045,000	5,892,000
Farm Equipment Service Parts [Member]
Revenue	676,000	659,000	1,234,000	1,278,000
Steel Cutting Tools and Inserts [Member]
Revenue	738,000	652,000	1,312,000	1,259,000
Modular Buildings [Member]
Revenue	1,157,000	1,177,000	2,009,000	2,317,000
Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Product and Service, Other [Member]
Revenue	174,000	107,000	288,000	365,000
Agricultural Products [Member]
Revenue	5,316,000	3,858,000	9,477,000	7,357,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	4,530,000	3,115,000	8,045,000	5,892,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	676,000	659,000	1,234,000	1,278,000
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	110,000	84,000	198,000	187,000
Modular Buildings [Member]
Revenue	1,209,000	1,194,000	2,077,000	2,485,000
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	1,157,000	1,177,000	2,009,000	2,317,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	0	0	0	0
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	52,000	17,000	68,000	168,000
Tools [Member]
Revenue	750,000	658,000	1,334,000	1,269,000
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	738,000	652,000	1,312,000	1,259,000
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	$ 22,000	$ 10,000