|
10. Income taxes: (Detail) - Fiscal Year Loss Incured and Expiration Date of Operating Loss Carryforward (USD $)
|
Dec. 31, 2033
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2008
|
Dec. 31, 2007
|
Dec. 31, 2006
|
Dec. 31, 2005
|
Dec. 31, 2004
|
Dec. 31, 2003
|
Dec. 31, 2002
|
Dec. 31, 2001
|
Dec. 31, 2000
|
Dec. 31, 1999
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $ 2,561,750 | $ 2,414,913 | $ 1,343,733 | $ 1,723,146 | $ 1,599,919 | $ 1,479,818 | $ 1,532,322 | $ 1,304,238 | $ 1,250,783 | $ 2,775,900 | $ 2,503,951 | $ 3,681,189 | $ 4,425,866 | $ 88,022 | ||
| Total | $ 28,685,595 | $ 28,789,460 |