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Segment Data (Details 1) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Jan. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations $ 22,269 $ 29,465 $ 42,638 $ 54,284  
Operating Profit (Loss) 2,631 5,700 2,800 8,919  
Depreciation and Amortization Expense 310 230 604 474  
Interest Expense 175 210 373 393  
Income Tax Expense (Benefits) 990 1,902 966 2,794  
Total assets [1] 88,694   88,694   $ 88,260
Assets Less Intersegment [1] 88,690   88,690   88,260
Property and Equipment 8,810   8,810   9,268
Capital Expenditures     50   840
Goodwill 871   871   871
Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations (9,740) (14,690) (17,370) (24,950)  
External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 22,270 29,470 42,640 54,280  
Intersegment Eliminations [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 9,740 14,690 17,370 24,950  
Operating Profit (Loss) (10) 30 60 (110)  
Depreciation and Amortization Expense (40) (40) (80) (70)  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) (10) 0 10 (30)  
Total assets [1] (49,800)   (49,800)   (52,520)
Property and Equipment (40)   (40)   (70)
Unites States [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 12,560 19,510 25,340 33,160  
Operating Profit (Loss) 2,470 5,120 4,040 7,690  
Depreciation and Amortization Expense 40 40 80 70  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) 0 0 0 0  
Total assets [1] 51,870   51,870   48,180
Assets Less Intersegment [1] 32,340   32,340   33,630
Property and Equipment 2,110   2,110   2,200
Capital Expenditures     0   60
Goodwill 870   870   870
Unites States [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 770 1,030 1,360 1,830  
Unites States [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 11,790 18,480 23,980 31,330  
Other foreign [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 3,720 3,760 6,910 6,840  
Operating Profit (Loss) 250 410 550 310  
Depreciation and Amortization Expense 60 10 80 30  
Interest Expense 20 40 60 60  
Income Tax Expense (Benefits) 80 70 110 120  
Total assets [1] 19,130   19,130   17,550
Assets Less Intersegment [1] 10,710   10,710   9,910
Property and Equipment 1,610   1,610   1,570
Capital Expenditures     10   80
Other foreign [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 190 150 510 230  
Other foreign [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 3,530 3,610 6,400 6,610  
Europe (UK) [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 2,670 3,450 5,060 9,060  
Operating Profit (Loss) 180 410 280 2,200  
Depreciation and Amortization Expense 0 0 0 10  
Interest Expense 0 0 0 10  
Income Tax Expense (Benefits) 20 20 30 420  
Total assets [1] 5,090   5,090   5,050
Assets Less Intersegment [1] 5,080   5,080   5,030
Property and Equipment 40   40   60
Capital Expenditures     0   0
Europe (UK) [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 0 0 0 10  
Europe (UK) [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 2,670 3,450 5,060 9,050  
Mexico [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 810 900 1,570 1,750  
Operating Profit (Loss) 20 (40) 10 (90)  
Depreciation and Amortization Expense 30 40 60 70  
Interest Expense 0 0 0 0  
Income Tax Expense (Benefits) 0 0 0 0  
Total assets [1] 3,970   3,970   4,250
Assets Less Intersegment [1] 3,950   3,950   4,230
Property and Equipment 2,050   2,050   2,110
Capital Expenditures     0   40
Mexico [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 450 550 840 1,100  
Mexico [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 360 350 730 650  
China [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 11,550 15,930 19,960 27,190  
Operating Profit (Loss) 1,310 1,410 1,780 2,180  
Depreciation and Amortization Expense 80 80 170 160  
Interest Expense 40 40 90 70  
Income Tax Expense (Benefits) 360 310 450 480  
Total assets [1] 28,610   28,610   29,920
Assets Less Intersegment [1] 19,220   19,220   17,630
Property and Equipment 2,210   2,210   2,370
Capital Expenditures     20   160
China [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 7,630 12,350 13,490 20,550  
China [Member] | External Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 3,920 3,580 6,470 6,640  
Corporate [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 700 610 1,170 1,230  
Operating Profit (Loss) (1,590) (1,640) (3,920) (3,260)  
Depreciation and Amortization Expense 140 100 290 200  
Interest Expense 120 130 220 250  
Income Tax Expense (Benefits) 540 1,500 370 1,800  
Total assets [1] 31,180   31,180   37,180
Assets Less Intersegment [1] 16,960   16,960   17,390
Property and Equipment 790   790   1,000
Capital Expenditures     0   500
Corporate [Member] | Intersegment Sales [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Net sales from continuing operations 700 $ 610 1,170 $ 1,230  
India [Member]          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Total assets [1] (1,360)   (1,360)   (1,350)
Assets Less Intersegment [1] 430   430   440
Property and Equipment $ 40   40   30
Capital Expenditures     $ 20   $ 0
[1] Negative assets reflect intersegment accounts eliminated in consolidation