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Segment Reporting (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Jan. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales $ 24,344 $ 22,961  
Operating Profit (Loss) 2,416 2,473  
Depreciation and Amortization Expense 187 186  
Interest Expense 31 76  
Income Tax Expense (Benefits) 517 688  
Total assets [1] 97,272   $ 94,531
Assets Less Intersegment [1] 97,270   94,530
Property and Equipment 8,821   8,789
Capital Expenditures 270 140  
Goodwill 871   871
Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales (12,320) (8,480)  
External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 24,340 22,960  
Intersegment Eliminations [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 12,320 8,480  
Operating Profit (Loss) 210 90  
Depreciation and Amortization Expense (10) (10)  
Income Tax Expense (Benefits) 60 20  
Total assets [1] (54,390)   (55,120)
Property and Equipment 50   30
USA [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 13,310 13,400  
Operating Profit (Loss) 2,630 2,260  
Depreciation and Amortization Expense 30 30  
Total assets [1] 69,000   67,020
Assets Less Intersegment [1] 34,720   33,160
Property and Equipment 1,990   1,990
Capital Expenditures 20 0  
Goodwill 870   870
USA [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 960 700  
USA [Member] | External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 12,350 12,700  
Other foreign [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 5,110 4,050  
Operating Profit (Loss) 570 430  
Depreciation and Amortization Expense 40 40  
Interest Expense 20 20  
Income Tax Expense (Benefits) 90 50  
Total assets [1] 20,610   20,300
Assets Less Intersegment [1] 13,140   12,610
Property and Equipment 1,400   1,500
Other foreign [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 760 350  
Other foreign [Member] | External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 4,350 3,700  
Europe (UK) [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 2,570 2,130  
Operating Profit (Loss) 90 70  
Income Tax Expense (Benefits) 20 10  
Total assets [1] 4,380   4,630
Assets Less Intersegment [1] 4,390   4,630
Property and Equipment 20   30
Europe (UK) [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 0 40  
Europe (UK) [Member] | External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 2,570 2,090  
Mexico [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 1,470 920  
Operating Profit (Loss) 130 30  
Depreciation and Amortization Expense 30 30  
Total assets [1] 5,660   4,690
Assets Less Intersegment [1] 5,760   4,840
Property and Equipment 2,050   1,990
Capital Expenditures 80 10  
Mexico [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 360 350  
Mexico [Member] | External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 1,110 570  
China [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 13,830 10,520  
Operating Profit (Loss) 580 970  
Depreciation and Amortization Expense 50 60  
Interest Expense 0 0  
Income Tax Expense (Benefits) 160 290  
Total assets [1] 31,860   31,590
Assets Less Intersegment [1] 19,140   16,970
Property and Equipment 2,030   1,920
Capital Expenditures 180 20  
China [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 9,880 6,620  
China [Member] | External Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 3,950 3,900  
India [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total assets [1] (810)   (850)
Assets Less Intersegment [1] 1,100   980
Property and Equipment 180   150
Capital Expenditures 40 0  
Corporate [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales 360 420  
Operating Profit (Loss) (1,790) (1,380)  
Depreciation and Amortization Expense 50 40  
Interest Expense 10 60  
Income Tax Expense (Benefits) 190 320  
Total assets [1] 20,960   22,270
Assets Less Intersegment [1] 19,020   21,340
Property and Equipment 1,100   $ 1,180
Capital Expenditures (50) 110  
Corporate [Member] | Intersegment Sales [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales $ 360 $ 420  
[1] Negative assets reflect intersegment amounts eliminated in consolidation