Annual report pursuant to Section 13 and 15(d)

Income Taxes - Unrecognized Tax Benefits (Details)

v3.10.0.1
Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Balance, beginning of year $ 600 $ 600
Additions for current year tax positions 300  
Additions for prior year tax positions 900 0
Settlements paid to tax authorities 0 0
Reductions of prior year tax positions (200) 0
Balance, end of year $ 1,600 $ 600