Note 1 - Summary of Significant Accounting Policies - Disaggregated Revenue From External Customer (Details) - USD ($)	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Revenue	$ 22,889,000	$ 19,727,000
Farm Equipment [Member]
Revenue	10,435,000	11,149,000
Farm Equipment Service Parts [Member]
Revenue	2,638,000	2,735,000
Steel Cutting Tools and Inserts [Member]
Revenue	2,086,000	2,239,000
Modular Buildings [Member]
Revenue	6,460,000	2,271,000
Modular Buildings Lease Income [Member]
Revenue	674,000	373,000
Product and Service, Other [Member]
Revenue	596,000	533,000
Sales-type Leases [Member]
Revenue		427,000
Agricultural Products [Member]
Revenue	13,508,000	14,344,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	10,435,000	11,149,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	2,638,000	2,735,000
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	435,000	460,000
Agricultural Products [Member] | Sales-type Leases [Member]
Revenue
Modular Buildings [Member]
Revenue	7,260,000	3,109,000
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	6,460,000	2,271,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue	674,000	373,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	126,000	38,000
Modular Buildings [Member] | Sales-type Leases [Member]
Revenue		427,000
Tools [Member]
Revenue	2,121,000	2,274,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	2,086,000	2,239,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 35,000	35,000
Tools [Member] | Sales-type Leases [Member]
Revenue