Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Deficit [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2008	$ 10	$ 122,396	$ (67,377)	$ 9,144	$ 64,173
Balance, shares at Dec. 31, 2008	102,943,446
Cumulative effect of adoption of ASC 815-40 [note 8]		(14,670)	13,995		(675)
Stock options exercised [note 6]		6			6
Stock options exercised, shares [note 6]	130,600
Stock-based compensation, value [note 6]		971			971
Noncontrolling interest contribution				5,322	5,322
Net loss for year			(16,291)	(4,601)	(20,892)
Balance at Dec. 31, 2009	10	108,703	(69,673)	9,865	48,905
Balance, shares at Dec. 31, 2009	103,074,046
Issuance of common stock, shares [note 13]	139,000
Stock options exercised [note 6]		77			77
Stock options exercised, shares [note 6]	1,079,366
Stock-based compensation, value [note 6]		784			784
Noncontrolling interest contribution				7,676	7,676
Net loss for year			(18,284)	(6,884)	(25,168)
Balance at Dec. 31, 2010	10	109,564	(87,957)	10,657	32,274
Balance, shares at Dec. 31, 2010	104,292,412
Stock options exercised [note 6]	1	137			138
Stock options exercised, shares [note 6]	1,855,342
Stock-based compensation, value [note 6]		729			729
Stock-based compensation, shares [note 6]	210,000
Noncontrolling interest contribution				3,238	3,238
Net loss for year			(14,818)	(3,949)	(18,767)
Balance at Dec. 31, 2011	$ 11	$ 110,430	$ (102,775)	$ 9,946	$ 17,612
Balance, shares at Dec. 31, 2011	106,357,754