Note 3 - Revenue Recognition - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Revenue	$ 5,747,000	$ 5,294,000	$ 9,871,000	$ 10,660,000
Farm Equipment [Member]
Revenue	2,879,000	3,123,000	4,881,000	6,373,000
Farm Equipment Service Parts [Member]
Revenue	665,000	698,000	1,216,000	1,286,000
Steel Cutting Tools and Inserts [Member]
Revenue	544,000	516,000	1,028,000	1,203,000
Modular Buildings [Member]
Revenue	1,368,000	734,000	2,163,000	1,407,000
Modular Buildings Lease Income [Member]
Revenue	168,000	67,000	348,000	116,000
Product and Service, Other [Member]
Revenue	123,000	156,000	235,000	275,000
Agricultural Products [Member]
Revenue	3,637,000	3,937,000	6,247,000	7,866,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	2,879,000	3,123,000	4,881,000	6,373,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	665,000	698,000	1,216,000	1,286,000
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	93,000	116,000	150,000	207,000
Modular Buildings [Member]
Revenue	1,558,000	834,000	2,580,000	1,573,000
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	1,368,000	734,000	2,163,000	1,407,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	168,000	67,000	348,000	116,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	22,000	33,000	69,000	50,000
Tools [Member]
Revenue	552,000	523,000	1,044,000	1,221,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	544,000	516,000	1,028,000	1,203,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 8,000	$ 7,000	$ 16,000	$ 18,000