Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Income Taxes (Textual)          
Income tax expense (benefit) $ 10 $ 25 $ 21 $ 38  
Effective income tax rate (1.00%) 0.80% (1.30%) 0.50%  
Effective tax rates, U.S. statutory corporate tax rate     35.00%    
Deferred tax assets, valuation allowance $ 7,900   $ 7,900   $ 7,900
Unrecognized tax benefits 1,700   1,700   1,700
Unrecognized tax benefits that would impact effective tax rate $ 100   $ 100   $ 100