Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2012

Property and Equipment

Schedule of property and equipment

	December 31,						September 30,
	2010			2011			2012
							(unaudited)
	(in thousands)
Computer equipment	$	554		$	586		$	604
Software		174			209			209
Lab equipment and furniture		3,480			3,465			3,707
Leasehold improvements		979			1,486			1,778
		5,187			5,746			6,298
Less accumulated depreciation and amortization		(3,938	)		(4,436	)		(4,914	)
	$	1,249		$	1,310		$	1,384