Other Financial Statement Data Other Financial Statement Data (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Wages and benefits	$ 1,233	$ 2,673
Warranty liability	709	717	$ 685
Other	502	366
Accrued expenses	$ 2,444	$ 3,756