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Segment Reporting (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
Jan. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales $ 23,960 $ 23,243 $ 70,831 $ 65,881  
Operating Profit (Loss) 2,665 2,248 7,320 4,996  
Depreciation and Amortization Expense 200 360 582 963  
Interest Expense 35 150 147 522  
Income Tax Expense (Benefits) 831 583 1,828 1,548  
Total assets 100,363   100,363   $ 84,554
Assets Less Intersegment [1] 100,360   100,360   84,550
Property and Equipment 8,624   8,624   8,527
Capital Expenditures 170 70 620 120  
Goodwill 871   871   871
Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales (12,200) (8,270) (31,380) (25,640)  
External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 23,960 23,240 70,830 65,880  
Intersegment Eliminations [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 12,200 8,270 31,380 25,640  
Operating Profit (Loss) 10 30 160 90  
Depreciation and Amortization Expense (10) 40 (40) (40)  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) (10) 10 30 20  
Total assets [1] (58,920)   (58,920)   (52,730)
Property and Equipment 20   20   (20)
Unites States [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 14,160 12,750 41,460 38,090  
Operating Profit (Loss) 2,620 1,580 7,400 5,620  
Depreciation and Amortization Expense 30 40 90 120  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) 0 0 0 0  
Total assets [1] 63,840   63,840   56,340
Assets Less Intersegment [1] 29,880   29,880   30,940
Property and Equipment 2,010   2,010   2,090
Capital Expenditures 10 20 20 20  
Goodwill 870   870   870
Unites States [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 1,310 1,490 3,280 2,850  
Unites States [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 12,850 11,260 38,180 35,240  
Other foreign [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 4,940 5,340 13,660 12,250  
Operating Profit (Loss) 920 810 2,040 1,360  
Depreciation and Amortization Expense 40 30 100 110  
Interest Expense 20 20 50 80  
Income Tax Expense (Benefits) 160 160 420 270  
Total assets [1] 21,170   21,170   18,160
Assets Less Intersegment [1] 12,870   12,870   10,170
Property and Equipment 1,460   1,460   1,550
Capital Expenditures 0 (10) 0 0  
Other foreign [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 550 250 1,190 760  
Other foreign [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 4,390 5,090 12,470 11,490  
Europe (UK) [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 2,240 1,900 6,460 6,950  
Operating Profit (Loss) (20) 10 90 290  
Depreciation and Amortization Expense 0 0 10 0  
Interest Expense 10 0 10 0  
Income Tax Expense (Benefits) 10 10 50 40  
Total assets [1] 4,650   4,650   3,610
Assets Less Intersegment [1] 4,650   4,650   3,580
Property and Equipment 30   30   30
Capital Expenditures 0 0 0 0  
Europe (UK) [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 0 0 40 0  
Europe (UK) [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 2,240 1,900 6,420 6,950  
Mexico [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 900 840 2,770 2,420  
Operating Profit (Loss) (60) 40 (20) 50  
Depreciation and Amortization Expense 30 30 90 90  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) 0 0 0 0  
Total assets [1] 4,380   4,380   3,990
Assets Less Intersegment [1] 4,460   4,460   4,070
Property and Equipment 2,020   2,020   2,050
Capital Expenditures 30 0 60 0  
Mexico [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 390 440 1,110 1,290  
Mexico [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 510 400 1,660 1,130  
China [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 13,470 10,410 36,880 30,370  
Operating Profit (Loss) 660 1,370 2,210 3,150  
Depreciation and Amortization Expense 60 80 190 250  
Interest Expense 0 40 0 120  
Income Tax Expense (Benefits) 120 360 500 810  
Total assets [1] 36,940   36,940   30,540
Assets Less Intersegment [1] 21,330   21,330   18,440
Property and Equipment 1,930   1,930   2,050
Capital Expenditures 10 10 70 30  
China [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 9,500 5,820 24,780 19,300  
China [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 3,970 4,590 12,100 11,070  
India [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total assets [1] (1,100)   (1,100)   (1,360)
Assets Less Intersegment [1] 840   840   430
Property and Equipment 100   100   30
Capital Expenditures 60 0 80 20  
Corporate [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales 450 270 980 1,440  
Operating Profit (Loss) (1,460) (1,600) (4,560) (5,560)  
Depreciation and Amortization Expense 50 140 140 430  
Interest Expense 10 90 90 320  
Income Tax Expense (Benefits) 550 40 830 410  
Total assets [1] 29,400   29,400   26,000
Assets Less Intersegment [1] 26,330   26,330   16,920
Property and Equipment 1,050   1,050   $ 750
Capital Expenditures 60 50 390 50  
Corporate [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales $ 450 $ 270 $ 980 $ 1,440  
[1] Negative assets reflect intersegment amounts eliminated in consolidation