Other Financial Statement Data (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Raw materials and purchased parts	$ 11,542	$ 9,845
Work in process	2,166	1,837
Finished goods	4,770	2,373
Demonstration inventories, net	1,437	1,525
Total inventories	$ 19,915	$ 15,580

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