Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Unrecognized Tax Benefit Roll-Forward (Details)

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Income Taxes - Schedule of Unrecognized Tax Benefit Roll-Forward (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
As of the beginning of the year $ 191 $ 247 $ 247
Increases for tax positions of current years 2 4 0
Reductions for tax positions of prior years 0 (60) 0
As of the end of the year $ 193 $ 191 $ 247