Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Allowance for bad debts	$ 208	$ 142
Inventory and deferred preservation costs write-downs	708	536
Investment in equity securities	58	58
Property	1,780	2,987
Intangible assets	2,034	591
Accrued expenses	4,215	3,276
Loss carryforwards	8,760	12,262
Credit carryforwards	1,001	616
Stock compensation	3,678	2,546
Transaction Costs	122	1,048
Deferred compensation	973	957
UNICAP	371	55
Tax benefit of tax reserves	333	53
Other	409	382
Less valuation allowance	(2,157)	(2,109)
Total deferred tax assets	22,493	23,400
Prepaid items	(436)	(471)
Intangible assets	(21,665)	(4,400)
Other	(399)	(341)
Total deferred tax liabilities	(22,500)	(5,212)
Total net deferred tax liabilities	$ (7)
Total net deferred tax assets		$ 18,188