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Segment Data (Details 1) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2014
Oct. 31, 2013
Jan. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales $ 25,092,772 $ 22,787,344 $ 73,210,278 $ 69,163,340  
Operating Profit (Loss) 697,551 (1,030,208) 2,747,286 29,898  
Depreciation and Amortization Expense 310,000 450,000 1,008,298 1,226,422  
Interest Expense (699,471) (649,436) (2,022,324) (1,390,623)  
Income Tax Expense (Benefits) 281,738 328,859 981,294 (3,103,143)  
Total assets 86,762,374   86,762,374   83,749,525
Property and Equipment 11,768,421   11,768,421   12,069,107
Capital Expenditures     400,000   830,000
Goodwill 871,297   871,297   871,297
External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 25,090,000 22,790,000 73,210,000 69,160,000  
Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 10,200,000 9,320,000 31,000,000 27,700,000  
Operating Profit (Loss) 70,000 (80,000) 150,000 0  
Depreciation and Amortization Expense (10,000) (10,000) (20,000) (10,000)  
Interest Expense 0 (90,000) 0 (410,000)  
Income Tax Expense (Benefits) 10,000 (50,000) 30,000 (260,000)  
Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales (10,200,000) (9,320,000) (31,000,000) (27,700,000)  
Unites States [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 14,760,000 12,400,000 40,470,000 37,600,000  
Operating Profit (Loss) 2,650,000 1,070,000 5,110,000 4,200,000  
Depreciation and Amortization Expense 40,000 50,000 130,000 160,000  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) 0 0 0 0  
Total assets 34,500,000   34,500,000   28,880,000
Property and Equipment 2,340,000   2,340,000   2,420,000
Capital Expenditures     40,000   80,000
Goodwill 870,000   870,000   870,000
Unites States [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 13,000,000 11,470,000 37,160,000 35,650,000  
Unites States [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 1,760,000 930,000 3,310,000 1,950,000  
Other foreign [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 4,550,000 2,440,000 11,430,000 8,670,000  
Operating Profit (Loss) 160,000 (30,000) 400,000 0  
Depreciation and Amortization Expense 20,000 40,000 60,000 120,000  
Interest Expense 30,000 20,000 50,000 80,000  
Income Tax Expense (Benefits) 170,000 150,000 330,000 290,000  
Total assets 19,020,000   19,020,000   15,090,000
Property and Equipment 1,960,000   1,960,000   2,060,000
Capital Expenditures     10,000   70,000
Other foreign [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 3,790,000 2,220,000 10,170,000 7,170,000  
Other foreign [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 760,000 220,000 1,260,000 1,500,000  
Europe [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 3,270,000 2,920,000 9,790,000 8,850,000  
Operating Profit (Loss) 270,000 90,000 800,000 560,000  
Depreciation and Amortization Expense 10,000 0 20,000 20,000  
Interest Expense 10,000 20,000 30,000 40,000  
Income Tax Expense (Benefits) 60,000 20,000 160,000 40,000  
Total assets 6,100,000   6,100,000   4,830,000
Property and Equipment 80,000   80,000   60,000
Capital Expenditures     30,000   10,000
Europe [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 3,270,000 2,920,000 9,790,000 8,850,000  
Mexico [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 850,000 900,000 2,620,000 2,350,000  
Operating Profit (Loss) (50,000) 50,000 (260,000) (30,000)  
Depreciation and Amortization Expense 10,000 10,000 40,000 40,000  
Interest Expense 0 30,000 0 70,000  
Income Tax Expense (Benefits) 10,000 0 (60,000) 10,000  
Total assets 3,900,000   3,900,000   3,730,000
Property and Equipment 2,060,000   2,060,000   2,090,000
Capital Expenditures     30,000   10,000
Mexico [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 380,000 380,000 1,080,000 880,000  
Mexico [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 470,000 520,000 1,540,000 1,470,000  
China [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 9,960,000 11,170,000 33,280,000 32,530,000  
Operating Profit (Loss) 540,000 1,050,000 2,800,000 2,650,000  
Depreciation and Amortization Expense 50,000 80,000 160,000 200,000  
Interest Expense 30,000 0 30,000 0  
Income Tax Expense (Benefits) 190,000 250,000 680,000 730,000  
Total assets 30,460,000   30,460,000   30,120,000
Property and Equipment 2,530,000   2,530,000   2,640,000
Capital Expenditures     80,000   440,000
China [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 3,100,000 3,900,000 9,910,000 11,290,000  
China [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 6,860,000 7,270,000 23,370,000 21,240,000  
Brazil [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 1,550,000 1,910,000 5,100,000 5,400,000  
Operating Profit (Loss) (590,000) (1,930,000) (1,190,000) (3,740,000)  
Depreciation and Amortization Expense 40,000 90,000 180,000 280,000  
Interest Expense 190,000 340,000 500,000 870,000  
Total assets 10,630,000   10,630,000   6,920,000
Property and Equipment 1,740,000   1,740,000   1,860,000
Capital Expenditures     10,000   90,000
Brazil [Member] | External Sales [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 1,550,000 1,900,000 5,100,000 5,320,000  
Brazil [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 0 10,000 0 80,000  
Corporate [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 350,000 370,000 1,520,000 1,460,000  
Operating Profit (Loss) (2,350,000) (1,250,000) (5,060,000) (3,610,000)  
Depreciation and Amortization Expense 150,000 190,000 440,000 420,000  
Interest Expense 440,000 330,000 1,410,000 740,000  
Income Tax Expense (Benefits) (160,000) (40,000) (160,000) (3,910,000)  
Total assets (16,560,000)   (16,560,000)   (4,630,000)
Property and Equipment 1,000,000   1,000,000   910,000
Capital Expenditures     180,000   130,000
Corporate [Member] | Intersegment Eliminations [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 350,000 370,000 1,520,000 1,460,000  
India [Member]
         
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total assets (1,290,000)   (1,290,000)   (1,190,000)
Property and Equipment 60,000   60,000   30,000
Capital Expenditures     $ 20,000   $ 0