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Income Taxes - Components of Deferred Federal Income Taxes (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred tax assets:    
Accrued liabilities $ 22 $ 161
Deferred compensation 936 726
Allowance for doubtful accounts 73 111
Inventory 73 122
Net operating loss 4,137 3,848
Property and equipment 123 66
Foreign tax credit carry forward 3,226 2,811
Deferred tax assets 8,590 7,845
Deferred tax liabilities:    
Valuation allowance (8,590) (7,845)
Equity in foreign investments (2,755) (2,523)
Translation gain (309) (523)
Deferred tax liabilities (11,654) (10,891)
Net deferred tax assets (liabilities) $ (3,064) $ (3,046)