Geographic and Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Revenue:	$ 461	$ 767	$ 1,187	$ 1,136
Net income (loss):	124,119	(55,862)	(41,415)	(47,071)
Identifiable assets:	7,538		7,538		7,600
United States [Member]
Revenue:	430	454	1,107	773
Net income (loss):	124,435	(55,664)	(40,765)	(46,421)
Identifiable assets:	7,059		7,059		6,998
Germany [Member]
Revenue:	31	313	80	363
Net income (loss):	(316)	(198)	(650)	(650)
Identifiable assets:	$ 479		$ 479		$ 602