COMMON STOCK WARRANT LIABILITY (Tables)

12 Months Ended

Dec. 31, 2012

Changes in Fair Value of Common Stock Warrant Liability

The following table presents changes in the fair value of the common stock warrant liability during the periods indicated:

	December 31,
(Dollars in thousands)	2012		2011
Beginning balance	$	1,403	$	5,700
Change in fair value of common stock warrant liability		947		(4,297	)
Ending balance	$	2,350	$	1,403

Summary of Assumptions Used to Estimate Fair Value of Common Stock Warrant Liability

The following table summarizes the assumptions used to estimate the fair value of the common stock warrant liability as of:

	December 31,
	2012			2011
Expected term (years)		7.1			8.2
Volatility		51.0	%		40.0	%
Risk-free rate		1.19	%		1.57	%
Weighted average exercise price	$	0.68		$	0.68