Other Financial Statement Data (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Raw materials and purchased parts	$ 12,428	$ 9,845
Work in process	2,236	1,837
Finished goods	5,408	2,373
Demonstration inventories, net	1,213	1,525
Total inventories	$ 21,285	$ 15,580

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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 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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