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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of liabilities that are measured and recognized at fair value on a recurring basis

($ in thousands)

Description	Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2011		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2012
Derivative liabilities related to Warrants	$	—	$	—	$	3,325	$	3,325	$	—	$	—	$	5,258	$	5,258

Summary of changes in the fair value of Level 3 liabilities

($ in thousands)

Description	Balance at December 31, 2010		Fair value of warrants exercised and reclassified to additional paid in capital			Fair Value of warrants upon issuance		(Gain) or loss recognized in earning from Change in Fair Value			Balance as of December 31, 2011		Fair Value of warrants upon issuance		(Gain) or loss recognized in earning from Change in Fair Value		Balance as of December 31, 2012
Derivative liabilities related to Warrants	$	3,487	$	(2,193	)	$	7,288	$	(5,257	)	$	3,325	$	—	$	1,933	$	5,258

- Definition

Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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