Investments - Additional Information (Detail) (CAD)	1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended					194 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Oct. 26, 2010	Jun. 16, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Jun. 30, 2012
Investment [Line Items]
Number of NVX common shares issued to the company	250,000	250,000	250,000		250,000		250,000		250,000					250,000
Number of NVX common share purchase warrants issued to the company	250,000	250,000	250,000		250,000		250,000		250,000					250,000
Warrant exercise price			0.40
Warrants exercise date			Oct. 26, 2012
Weighted average price of the common shares that may result in NVX to notify the Company in writing that the NVX warrants will expire 15 trading days from receipt of such notice			0.60
Consecutive trading days, weighted average price of the common shares of NVX exceeds $0.60			20 days
Warrants expiration period after receipt of notice			15 days
Expected life	3 months 18 days	9 months 26 days		2 years
Volatility	151.00%	68.00%		131.00%
Risk free interest rate	1.60%	0.91%		1.82%
Unrealized (gain) loss on investment , accumulated other comprehensive income					58,750	25,000	51,250	(18,750)	13,750	13,125	53,850	(502,225)	(120,000)
Unrealized gain (loss) on investments, in statement of operations					(6,330)	(4,382)	(8,587)	1,534						(608,874)