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Segment Reporting (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2020
Operating profit $ 4,089,000 $ 12,493,000 $ 14,254,000 $ 34,597,000  
Total [Member]          
Net sales 30,030,000.00 41,450,000 91,590,000 122,050,000.00  
External sales 30,030,000.00 41,450,000 91,590,000 122,050,000.00  
Intersegment sales 14,120,000 18,270,000 43,350,000 49,180,000  
Operating profit 4,090,000.00 12,490,000 14,250,000 34,600,000  
Total assets less intersegment 145,150,000   145,150,000   $ 139,920,000
USA [Member]          
Net sales 11,720,000 17,430,000 39,430,000 57,110,000  
External sales 10,610,000 17,040,000.00 36,460,000 54,600,000  
Intersegment sales 1,090,000.00 390,000 2,970,000 2,500,000  
Operating profit (2,030,000.00) 2,170,000 (2,880,000) 7,860,000  
Total assets less intersegment 53,840,000   53,840,000   52,310,000
Other Foreign [Member]          
Net sales 2,220,000 3,390,000 7,230,000 8,810,000  
External sales 1,690,000 2,720,000 5,020,000.00 7,040,000.00  
Intersegment sales 540,000 670,000 2,220,000 1,770,000  
Operating profit 400,000 960,000 1,400,000 3,350,000  
Total assets less intersegment 8,550,000   8,550,000   8,370,000
Europe (UK) [Member]          
Net sales 1,700,000 5,580,000 8,790,000 12,750,000  
External sales 1,700,000 5,580,000 8,790,000 12,750,000  
Operating profit (40,000.00) 1,750,000 1,720,000 3,350,000  
Total assets less intersegment 9,350,000   9,350,000   11,330,000
Mexico [Member]          
Net sales 1,250,000 2,120,000 4,120,000 4,840,000  
External sales 990,000 1,910,000 3,290,000 3,890,000  
Intersegment sales 270,000 210,000 830,000 950,000  
Operating profit (280,000) 110,000 (610,000) 120,000  
Total assets less intersegment 5,310,000   5,310,000   5,620,000
Asia [Member]          
Net sales 21,850,000 23,250,000 59,310,000 67,420,000  
External sales 9,830,000 6,360,000 22,400,000 23,800,000  
Intersegment sales 12,020,000.00 16,900,000 36,910,000 43,620,000  
Operating profit 4,960,000 6,040,000.00 11,340,000 15,510,000  
Total assets less intersegment 54,470,000   54,470,000   47,290,000
Canada [Member]          
Net sales 2,920,000 4,200,000 6,780,000 10,920,000  
External sales 2,920,000 4,200,000 6,780,000 10,920,000  
Operating profit 650,000 550,000 1,410,000 1,950,000  
Total assets less intersegment 5,420,000   5,420,000   8,030,000.00
Latin America [Member]          
Net sales 2,490,000 3,750,000 9,280,000 9,380,000  
External sales 2,290,000 3,640,000 8,850,000 9,050,000.00  
Intersegment sales 200,000 100,000 420,000 340,000  
Operating profit 430,000 1,240,000 2,100,000 2,930,000  
Total assets less intersegment 8,210,000   8,210,000   $ 6,970,000
Intersegment [Member]          
Net sales (14,120,000) (18,270,000) (43,350,000) (49,180,000)  
Operating profit $ 0 $ (330,000) $ (230,000) $ (470,000)