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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) $ (2,075) $ (2,843)
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 556 408 322
Net deferred tax liability $ (1,163) $ (1,667) $ (2,521)