Other Financial Statement Data (Schedule Of Inventory Components) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
OTHER FINANCIAL STATEMENT DATA [Abstract]
Raw materials and purchased parts	$ 9,845	$ 8,821
Work in process	1,837	2,446
Finished goods	2,373	2,526
Demonstration inventories, net	1,525	2,370
Total inventories	$ 15,580	$ 16,163

Other Financial Statement Data [Abstract]

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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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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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of items purchased for use as components of a finished product or pieces of machinery and equipment plus any items in their natural and unrefined state. This element may be used when the reporting entity combines raw materials and purchased parts into an aggregate amount.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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- Definition

Gross amount of merchandise, goods, commodities, or supplies to which the entity holds the title and uses for the specific purpose of showing the benefits and features of the entity's products to existing or potential customers.

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