v2.4.0.6
10. Income taxes: (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
 
 
2012
 
2011
Computed expected benefit of income taxes
$
(2,831,744)
$
(1,794,067)
Stock-based compensation
 
1,903,205
 
912,048
Non-deductible interest expense
 
57,544
 
60,949
Increase in valuation allowance
 
870,995
 
821,070
Income tax provision
$
-
$
-
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
 
 
2012
 
2011
Net operating loss carried forward
$
28,685,595
$
26,123,845
Tax rate
 
34%
 
34%
Deferred income tax assets
 
9,753,102
 
8,882,107
Valuation allowance
 
(9,753,102)
 
(8,882,107)
Net deferred income tax asset
$
-
$
-
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Fiscal Year
 
Amount
Expiry Date
1999
$
88,022
2019
2000
 
4,425,866
2020
2001
 
3,681,189
2021
2002
 
2,503,951
2022
2003
 
2,775,900
2023
2004
 
1,250,783
2024
2005
 
1,304,238
2025
2006
 
1,532,322
2026
2007
 
1,479,818
2027
2008
 
1,599,919
2028
2009
 
1,723,146
2029
2010
 
1,343,733
2030
2011
 
2,414,913
2031
2012
 
2,561,750
2032
Total
$
28,685,595