Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation Of Effective Rate) (Detail)

v3.19.1
Income Taxes (Reconciliation Of Effective Rate) (Detail)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Effective Income Tax Rate Reconciliation [Line Items]      
Federal Income Tax at Statutory Rate 21.00% 34.00% 34.00%
State Tax Provision, Net of Federal Benefit 0.30% 0.30% 0.30%
Foreign Tax Rate Differential 0.00% 0.00% (0.70%)
Change in Corporate Tax Rates from 34% to 21% 0.00% (52.90%) 0.00%
Permanent Differences (1.50%) (2.40%) (2.40%)
Federal Tax Credits 2.50% 1.10% 2.90%
Other 0.30% 0.60% 0.00%
Effective Tax Rate 22.60% (19.30%) 34.10%
Change in Valuation Allowance (22.60%) 19.30% (34.10%)
Net Effective Tax Rate 0.00% 0.00% 0.00%