Note 3 - Disaggregation of Revenue - Disaggregated Revenue From External Customer (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
Revenue	$ 5,710,000	$ 5,446,000	$ 11,111,000	$ 10,472,000
Farm Equipment [Member]
Revenue	3,115,000	2,299,000	5,892,000	4,647,000
Farm Equipment Service Parts [Member]
Revenue	659,000	669,000	1,278,000	1,200,000
Steel Cutting Tools and Inserts [Member]
Revenue	652,000	570,000	1,259,000	1,179,000
Modular Buildings [Member]
Revenue	1,177,000	1,633,000	2,317,000	2,884,000
Modular Buildings Lease Income [Member]
Revenue		163,000		318,000
Product and Service, Other [Member]
Revenue	107,000	112,000	365,000	244,000
Agricultural Products [Member]
Revenue	3,858,000	3,071,000	7,357,000	6,023,000
Agricultural Products [Member] | Farm Equipment [Member]
Revenue	3,115,000	2,299,000	5,892,000	4,647,000
Agricultural Products [Member] | Farm Equipment Service Parts [Member]
Revenue	659,000	669,000	1,278,000	1,200,000
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	84,000	103,000	187,000	176,000
Modular Buildings [Member]
Revenue	1,194,000	1,799,000	2,485,000	3,256,000
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	1,177,000	1,633,000	2,317,000	2,884,000
Modular Buildings [Member] | Modular Buildings Lease Income [Member]
Revenue		163,000		318,000
Modular Buildings [Member] | Product and Service, Other [Member]
Revenue	17,000	3,000	168,000	54,000
Tools [Member]
Revenue	658,000	576,000	1,269,000	1,193,000
Tools [Member] | Farm Equipment [Member]
Revenue
Tools [Member] | Farm Equipment Service Parts [Member]
Revenue
Tools [Member] | Steel Cutting Tools and Inserts [Member]
Revenue	652,000	570,000	1,259,000	1,179,000
Tools [Member] | Modular Buildings [Member]
Revenue
Tools [Member] | Modular Buildings Lease Income [Member]
Revenue
Tools [Member] | Product and Service, Other [Member]
Revenue	$ 6,000	$ 6,000	$ 10,000	$ 14,000