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Note 2 - Significant Accounting Policies (Tables)
 12 Months Ended
Jan. 31, 2019
Notes Tables  
Restrictions on Cash and Cash Equivalents [Table Text Block]
(In thousands)
 
2018
 
2017
Cash and cash equivalents
   $
10,156
 
   $
7,084
 
Restricted cash
    
2,581
 
    
1,237
 
Cash, cash equivalents and restricted cash shown in the statement of cash flows
   $
12,737
 
   $
8,321
 
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
(In thousands)
 
2018
 
2017
Equity adjustment foreign currency, gross
   $
(1,438
)
   $
(268
)
Minimum pension liability, gross
    
(1,648
)
    
(1,307
)
Marketable security, gross
    
—
 
    
—
 
Subtotal excluding tax effect
    
(3,086
)
    
(1,575
)
Tax effect of foreign exchange currency
    
91
 
    
(6
)
Tax effect of minimum pension liability
    
115
 
    
115
 
Tax effect of marketable security
    
—
 
    
—
 
Total accumulated other comprehensive loss
   $
(2,880
)
   $
(1,466
)
Schedule of Inventory, Current [Table Text Block]
(In thousands)
 
2018
 
2017
Raw materials
   $
11,962
 
   $
17,166
 
Work in process
    
488
 
    
291
 
Finished goods
    
731
 
    
1,024
 
Subtotal
    
13,181
 
    
18,481
 
Less allowance
    
892
 
    
1,625
 
Inventories
   $
12,289
 
   $
16,856
 
Property, Plant and Equipment [Table Text Block]
(In thousands)
 
2018
 
2017
Land, buildings and improvements
   $
22,327
 
   $
22,796
 
Machinery and equipment
    
47,168
 
    
47,009
 
Furniture, office equipment and computer systems
    
4,335
 
    
4,504
 
Transportation equipment
    
3,311
 
    
3,490
 
Subtotal
    
77,141
 
    
77,799
 
Less accumulated depreciation
    
46,743
 
    
43,290
 
Property, plant and equipment, net of accumulated depreciation
   $
30,398
 
   $
34,509
 
Schedule of Goodwill [Table Text Block]
   
 
 
 
  
Foreign exchange
  
 
 
 
(In thousands)
 
January 31, 2018
 
change effect
 
January 31, 2019
Goodwill
   $
2,423
 
   $
(154
)
   $
2,269
 
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Basic weighted average number of common shares outstanding (in thousands)
 
2018
 
2017
Basic weighted average number of common shares outstanding
    
7,812
 
    
7,680
 
Dilutive effect of stock options and restricted stock units
    
—
 
    
—
 
Weighted average number of common shares outstanding assuming full dilution
    
7,812
 
    
7,680
 
                 
Stock options not included in the computation of diluted EPS of common stock because the option exercise prices exceeded the average market prices
    
136
 
    
139
 
Canceled options during the year
    
(63
)
    
(131
)
Stock options with an exercise price below the average stock price
    
82
 
    
219