Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits) (Details)

v3.7.0.1
Income Taxes (Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of the beginning and ending amount of unrecognized tax benefits    
Balance at the beginning of the period $ 1,068 $ 856
Additions based on tax positions related to prior year (9)
Additions based on tax positions related to current year 68 212
Balance at the end of the period 1,127 $ 1,068
Interest or penalties related to unrecognized tax benefits $ 0