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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:    
Product liability $ 655 $ 263
Employee compensation and benefits 3,627 3,822
Allowances for doubtful accounts and discounts 3,813 3,454
Inventories 981 886
Stock-based compensation 2,527 5,410
Other 1,533 1,623
Total deferred tax assets 13,136 15,458
Deferred tax liabilities:    
Depreciation 12,457 12,946
Other 345 343
Total deferred tax liabilities 12,802 13,289
Net deferred tax assets $ 334 $ 2,169