Annual report pursuant to Section 13 and 15(d)

Income Taxes - Income Tax Reconciliation Components Permanent And Other Differences (Details)

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Income Taxes - Income Tax Reconciliation Components Permanent And Other Differences (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Meals and Entertainment $ 7 $ 7 $ 7
Return to provision adjustment
Charitable contributions $ 1 $ 1
Share-based compensation expense for stock options granted $ 46 160 54
Income Tax Reconciliation, Nondeductible Expense $ 53 $ 168 $ 62