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Income Taxes - Components of Deferred Federal Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Net operating loss $ 7,400  
Valuation allowance (5,600) (6,400)
Current
    
Deferred tax assets:    
Accrued liabilities 413 159
Deferred compensation      
Allowance for doubtful accounts 120 101
Inventory 270 388
Long-term contracts 149 80
Net operating loss      
Intangible assets      
Foreign tax credit carry forward      
Valuation allowance    (728)
Deferred tax assets 952   
Deferred tax liabilities:    
Equity in foreign investments      
Property and equipment      
Intangible assets      
Translation gain      
Deferred tax liabilities      
Net deferred tax assets (liabilities) 952   
Noncurrent
    
Deferred tax assets:    
Accrued liabilities      
Deferred compensation 686 363
Allowance for doubtful accounts      
Inventory      
Long-term contracts      
Net operating loss 2,909 4,205
Intangible assets 86 111
Foreign tax credit carry forward 1,153 1,017
Valuation allowance (5,385) (5,750)
Deferred tax assets (551) (54)
Deferred tax liabilities:    
Equity in foreign investments (3,233) (2,756)
Property and equipment (147) 61
Intangible assets (9) (9)
Translation gain (553) (411)
Deferred tax liabilities (3,942) (3,115)
Net deferred tax assets (liabilities) $ (4,493) $ (3,169)