Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements.

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+ Details

Derivative Financial Instruments (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Derivative Financial Instruments
Derivative liabilities related to Warrants	$ 6,351	$ 5,258	$ 4,663	$ 4,803	$ 3,317	$ 3,325
Fair value on a recurring basis \| Significant Unobservable Inputs (Level 3) \| Derivative instrument liability \| Warrants
Derivative Financial Instruments
Derivative liabilities related to Warrants	6,351	5,258
Fair value on a recurring basis \| Total Fair Value \| Derivative instrument liability \| Warrants
Derivative Financial Instruments
Derivative liabilities related to Warrants	$ 6,351	$ 5,258