Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Abstract]
Statutory income tax expense	21.00%	21.00%	21.00%
Foreign taxes	1.30%	3.60%	0.20%
State income taxes, net of federal income taxes	10.10%	10.20%	1.90%
Income Tax credits	(14.10%)	(17.10%)	(5.60%)
Incentive Stock options	(5.50%)	9.90%	(3.70%)
Change in effective state rate	(0.50%)	2.30%	(0.10%)
Deferred tax asset write-offs		73.10%	31.40%
Executive compensation limitation	7.30%	15.60%
Change in valuation allowance	(129.50%)	(175.40%)	(135.90%)
Research and development expenditure	1.70%
Fair value inventory step-up	4.80%
Transaction costs	10.20%
Other	5.20%	2.10%	0.70%
Income tax expense (benefit)	(88.00%)	(54.70%)	(90.10%)