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Fair Value of Assets and Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2012
Changes in the warrant liability
Balance, December 31, 2011			$ 1,178	$ 1,178
Increase (decrease) in fair value:
Increase (decrease) in Fair Value	(109)	(1,318)	1,321	(106)
Balance, September 30, 2012	$ 1,072			$ 1,072

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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