CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Treasury shares	Retained earnings
Beginning Balance at Dec. 31, 2009	$ 6,597	$ 84,219	$ 172,339	$ (217)	$ (249,744)
Beginning Balance (in shares) at Dec. 31, 2009		98,801,982
Warrants exercised (in shares)		1,044,937
Warrants exercised	1,494	768	726
Transfer of fair value of warrants exercised from liabilities to equity	1,952		1,952
Stock-based compensation	1,251		1,251
Loss for the period	(50,568)				(50,568)
Ending Balance at Jun. 30, 2010	(39,274)	84,987	176,268	(217)	(300,312)
Ending Balance (in shares) at Jun. 30, 2010		99,846,919
Beginning Balance at Dec. 31, 2010	(202,367)	90,465	206,718	(217)	(499,333)
Beginning Balance (in shares) at Dec. 31, 2010		106,856,731
Warrants exercised (in shares)		10,330,642
Warrants exercised	14,930	8,289	6,641
Transfer of fair value of warrants exercised from liabilities to equity	108,458		108,458
Stock issued in January financing (in shares)		13,800,000
Stock issued in January financing	98,654	10,723	87,931
Stock options exercised (in shares)		2,164,647
Stock options exercised	4,954	1,745	3,209
Tax benefits from stock-based compensation	1,061		1,061
Stock issued for services (in shares)		11,810
Stock issued for services	44	9	35
Stock-based compensation	3,360		3,360
Loss for the period	(183,809)				(183,809)
Ending Balance at Jun. 30, 2011	$ (154,715)	$ 111,231	$ 417,413	$ (217)	$ (683,142)
Ending Balance (in shares) at Jun. 30, 2011		133,163,830