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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
Tax expense (benefit) at statutory rate	$ (3,606)	$ 345	$ (1,340)
Valuation allowance change	3,952	153	719
Nondeductible executive compensation	580	778	320
Foreign income taxes	378	425	(250)
Foreign interest disallowance	298	292
Nondeductible entertainment expenses	94	201	206
Foreign deferred items	(63)	365
Equity compensation	(204)	(1,921)	(2,081)
State income taxes, net of federal benefit	(455)	(108)	(8)
Research and development credit	(457)	(400)	(557)
Net change in uncertain tax positions	(1,115)	(360)	(154)
Other	106	154	(406)
Total income tax benefit	$ (492)	$ (76)	$ (3,551)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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