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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Income Taxes [Abstract]    
Allowance for bad debts $ 101 $ 208
Inventory and deferred preservation costs write-downs 570 708
Investment in equity securities 36 58
Property   1,780
Intangible assets 1,306 2,034
Accrued expenses 4,719 4,215
Loss carryforwards 8,369 8,760
Credit carryforwards 771 1,001
Stock compensation 2,213 3,678
Transaction Costs   122
Deferred compensation 1,010 973
UNICAP 390 371
Tax benefit of tax reserves 229 333
Other 402 409
Less valuation allowance (2,469) (2,157)
Total deferred tax assets 17,647 22,493
Prepaid items (285) (436)
Intangible assets (43,647) (21,665)
Property (1,632)  
Other (904) (399)
Total deferred tax liabilities (46,468) (22,500)
Total net deferred tax liabilities $ (28,821) $ (7)