Note 3 - Disaggregation of Revenue - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Revenue	$ 5,446,000	$ 5,747,000	$ 10,472,000	$ 9,871,000
Farm Equipment [Member]
Revenue	2,299,000	2,879,000	4,647,000	4,881,000
Farm Equipment Service Parts [Member]
Revenue	669,000	665,000	1,200,000	1,216,000
Steel Cutting Tools and Inserts [Member]
Revenue	570,000	544,000	1,179,000	1,028,000
Modular Buildings [Member]
Revenue	1,633,000	1,368,000	540,000	2,163,000
Modular Buildings Lease Income [Member]
Revenue	163,000	168,000	318,000	348,000
Product and Service, Other [Member]
Revenue	112,000	123,000	2,588,000	235,000
Agricultural Products [Member]
Revenue	3,071,000	3,637,000	6,023,000	6,247,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	2,299,000	2,879,000	4,647,000	4,881,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	669,000	665,000	1,200,000	1,216,000
Agricultural Products [Member] | Steel Cutting Tools and Inserts [Member]
Revenue
Agricultural Products [Member] | Modular Buildings [Member]
Revenue
Agricultural Products [Member] | Modular Buildings Lease Income [Member]
Revenue
Agricultural Products [Member] | Product and Service, Other [Member]
Revenue	103,000	93,000	176,000	150,000
Modular Buildings [Member]
Revenue	1,799,000	1,558,000	3,256,000	2,580,000
Modular Buildings [Member] | Farm Equipment [Member]
Revenue
Modular Buildings [Member] | Farm Equipment Service Parts [Member]
Revenue
Modular Buildings [Member] | Steel Cutting Tools and Inserts [Member]
Revenue
Modular Buildings [Member] | Modular Buildings [Member]
Revenue	1,633,000	1,368,000	540,000	2,163,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	163,000	168,000	318,000	348,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	3,000	22,000	2,398,000	69,000
Tools [Member]
Revenue	576,000	552,000	1,193,000	1,044,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	570,000	544,000	1,179,000	1,028,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 6,000	$ 8,000	$ 14,000	$ 16,000