Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)

v3.20.1
Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]      
Statutory income tax (benefit) expense 21.00% 21.00% (34.00%)
Foreign taxes 0.20% (0.90%) 1.70%
State income taxes, net of federal income taxes 1.90% 3.40% (2.30%)
Income Tax credits (5.60%) (6.80%) (5.00%)
Incentive Stock options (3.70%) 1.30% 5.50%
Change in effective state rate (0.10%) 0.30% (1.50%)
Deferred tax asset write-off 31.40% 21.70%  
Translation loss     (6.90%)
Impact of tax reform     (105.70%)
Other 0.70% 1.10% 3.30%
Change in valuation allowance (135.90%) (53.90%) 56.60%
Income tax expense (benefit) (90.10%) (12.80%) (88.30%)