Condensed Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Deficit	Noncontrolling Interest
Beginning Balance, Amount at Dec. 31, 2010	$ 32,274	$ 10	$ 109,564	$ (87,957)	$ 10,657
Beginning Balance, Shares at Dec. 31, 2010		104,292,412
Stock options exercised, Shares [note 6]		1,855,342
Stock options exercised, Amount [note 6]	138	1	137
Stock-based compensation, Shares [note 6]		210,000
Stock-based compensation, Value [note 6]	729		729
Noncontrolling interest contribution	3,238				3,238
Net loss	(18,767)			(14,818)	(3,949)
Ending Balance, Amount at Dec. 31, 2011	17,612	11	110,430	(102,775)	9,946
Ending Balance, shares at Dec. 31, 2011		106,357,754
Vesting of restricted stock [note 6]		100,000
Stock options exercised, Shares [note 6]	181,848	181,848
Stock options exercised, Amount [note 6]	36		36
Stock-based compensation, Value [note 6]	75		75
Net loss	(6,072)			(5,526)	(546)
Ending Balance, Amount at Jun. 30, 2012	$ 11,651	$ 11	$ 110,541	$ (108,301)	$ 9,400
Ending Balance, shares at Jun. 30, 2012		106,639,602