Income Taxes (Reconciliation of Gross Unrecognized Tax Benefits Excluding Interest and Penalties) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Components Of Income Tax Expense Benefit Continuing Operations [Abstract] | |||
Balance as of January 1, | $ 261 | $ 210 | $ 113 |
Additions for current year tax positions | 51 | 97 | |
Expiration of statutes | (40) | ||
Balance as of December 31, | $ 221 | $ 261 | $ 210 |