Equity-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense recognized using the straight-line attribution method in the Consolidated Statement of Operations is as follows:

	Three months ended					Nine months ended
	September 30,					September 30,
	2013		2012			2013		2012
Stock option compensation expense for employees and directors	$	620	$	277		$	826	$	833
Equity awards for nonemployees issued for services		99		(3	)		102		24
Total stock-based compensation expense	$	719	$	274		$	928	$	857

Summary of Stock Option Activity

	Number of shares			Weighted- average exercise price		Weighted- average remaining contractual term (in years)		Aggregate intrinsic value
Outstanding at December 31, 2012		562,025		$	18.50		7.0	$	—
Granted		732,000		$	4.96
Exercised		—			—
Forfeited		(24,705	)	$	14.82
Outstanding at September 30, 2013		1,269,320		$	10.78		7.7	$	89
Exercisable at September 30, 2013		696,037		$	15.48		7.2	$	23

Details of Fair Value Option Award

The fair market value of the options was computed using the Black-Scholes option-pricing model with the following key weighted average assumptions for the nine months ended as of the dates indicated:

	September 30, 2013			September 30, 2012
Expected life (years)		5.6 years			6.0 years
Interest rate		1.4	%		2.3	%
Dividend yield		—			—
Volatility		71	%		60	%