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12. Income taxes (Tables)
3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Components of Company's Future Tax Assets
   March 31, 2015  December 31, 2014
           
Net operating loss carry forward  $12,259,149   $11,934,958 
Valuation allowance   (12,259,149)   (11,934,958)
Net future tax asset  $—     $—   
Reconciliation of Income Taxes
   March 31, 2015  December 31, 2014
           
Tax at statutory rate  $113,467   $570,870 
Valuation allowance   (113,467)   (570,870)
Net future tax asset  $—     $—