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Provision For Income Taxes (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Non-current deferred tax assets (liabilities) arising from:      
Accumulated depreciation and amortization $ (1,719) $ (2,075) $ (2,896)
Capital loss carry-forwards 53
Total non-current net deferred tax liabilities (1,719) (2,074)  
Current deferred tax assets arising from:      
Capital loss carry-forward & investment impairment 164 9
Unrealized losses (gain) on investments 45 127 (8)
Inventory 308 233 308
Allowance for doubtful accounts and discounts 39 39 22
Total current deferred tax assets 556 408  
Net deferred tax liability $ (1,163) $ (1,667) $ (2,521)