v2.4.0.6
10. Income taxes: (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2033
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate $ 0.34 $ 0.34  
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration $ 28,789,460   $ 28,685,595