Stock Option Plans (Tables)

6 Months Ended

Jun. 30, 2013

Summary of Non-Cash Stock-Based Compensation

The following table provides a summary of non-cash stock-based compensation. All figures are in thousands.

	Three Months  Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Research and development	$	157	$	138	$	305	$	256
Selling, general and administrative		1,108		744		2,270		3,015
Total non-cash stock-based compensation	$	1,265	$	882	$	2,575	$	3,271