Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Unrecognized tax benefits (Details)

v3.8.0.1
Income Taxes - Unrecognized tax benefits (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Balance, beginning of period $ 600
Additions for prior year tax positions 0
Settlements with tax authorities 0
Reductions of prior year tax positions 0
Balance, end of period $ 600