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Income Taxes - Components of Deferred Federal Income Taxes (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Accrued liabilities $ 15 $ 22
Deferred compensation 1,113 936
Allowance for doubtful accounts 101 73
Inventory 83 73
Net operating loss 6,528 4,137
Property and equipment 143 123
Foreign tax credit carry forward 3,297 3,226
Deferred tax assets 11,280 8,590
Deferred tax liabilities:    
Valuation allowance (11,280) (8,590)
Equity in foreign investments (2,824) (2,755)
Translation gain   (309)
Deferred tax liabilities (14,104) (11,654)
Net deferred tax assets (liabilities) $ (2,824) $ (3,064)