Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Inventory [Line Items]
Raw materials	$ 15,723	$ 12,861
Work-in process	2,251	951
Finished products and components	2,489	2,565
Total	20,463	16,377
Domestic [Member]
Inventory [Line Items]
Raw materials	11,946	10,379
Work-in process	1,182	736
Finished products and components	2,301	2,375
Total	15,429	13,490
Foreign [Member]
Inventory [Line Items]
Raw materials	3,777	2,482
Work-in process	1,069	215
Finished products and components	188	190
Total	$ 5,034	$ 2,887

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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