Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory [Line Items]
Raw materials	$ 7,482	$ 8,986
Work-in process	1,608	2,342
Finished products and components	3,253	2,690
Total	12,343	13,635
United States [Member]
Inventory [Line Items]
Raw materials	5,731	6,201
Work-in process	1,324	1,636
Finished products and components	2,609	2,347
Total	9,664	10,184
Foreign [Member]
Inventory [Line Items]
Raw materials	1,751	2,472
Work-in process	284	636
Finished products and components	644	343
Total	$ 2,679	$ 3,451

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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