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15. Income taxes (Tables)
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Components of Future Tax Asset
   June 30, 2015  December 31, 2014
           
Net operating loss carry forward  $19,914,883   $19,566,029 
Valuation allowance   (19,914,883)   (19,566,029)
Net future tax asset  $—     $—   
Reconciliation of Income Taxes
   June 30, 2015  December 31, 2014
           
Tax benefit at statutory rate  $122,099   $570,870 
Valuation allowance   (122,099)   (570,870)
Net future tax asset  $—     $—