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6. Income Taxes (Details Narrative 2) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Income Tax Disclosure [Abstract]        
Shortfall tax expense $ 19      
Windfall tax benefit   $ 2    
Effective income tax rate (as a percent) 0.00%   0.00% 0.00%
Federal statutory rate (as a percent)     34.00%  
Income tax expense $ 0   $ 0 $ 0