Segment Reporting (Details ) - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
External sales	$ 27,280,000	$ 34,100,000
Operating profit	1,449,000	6,631,000
Other Foreign [Member]
Net sales	2,200,000	2,460,000
External sales	1,810,000	1,580,000
Intersegment sales	390,000	880,000
Operating profit	210,000	570,000
Total assets less intersegment	9,200,000		$ 8,920,000
Europe (UK) [Member]
Net sales	1,980,000	4,400,000
External sales	1,980,000	4,400,000
Operating profit	(260,000)	1,600,000
Total assets less intersegment	8,010,000.00		8,790,000
Asia [Member]
Net sales	14,660,000	18,190,000
External sales	7,240,000	5,640,000
Intersegment sales	7,420,000	12,550,000
Operating profit	2,560,000	3,480,000
Total assets less intersegment	54,840,000		52,260,000
Latin America [Member]
Net sales	1,900,000	3,560,000
External sales	1,900,000	3,450,000
Intersegment sales	0	110,000
Operating profit	300,000	900,000
Total assets less intersegment	7,450,000		7,410,000
Intersegment [Member]
Net sales	(9,220,000)	(14,510,000)
Operating profit	610,000	(710,000)
Canada [Member]
Net sales	2,280,000	1,780,000
External sales	2,280,000	1,780,000
Operating profit	630,000	470,000
Total assets less intersegment	6,150,000		4,990,000
Mexico [Member]
Net sales	1,240,000	1,810,000
External sales	840,000	1,550,000
Intersegment sales	400,000	260,000
Operating profit	(540,000)	50,000.00
Total assets less intersegment	4,650,000		5,060,000.00
USA [Member]
Net sales	12,240,000	16,410,000
External sales	11,230,000	15,700,000
Intersegment sales	1,010,000.00	710,000
Operating profit	(2,060,000.00)	270,000
Total assets less intersegment	52,340,000		53,360,000
Total [Member]
Net sales	27,280,000	34,100,000
External sales	27,280,000	34,100,000
Intersegment sales	9,220,000	14,510,000
Operating profit	1,450,000	$ 6,630,000
Total assets less intersegment	$ 142,640,000		$ 140,790,000