Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2012

Property and equipment consist of the following (in thousands):

	December 31,

	2011			2012
Property and equipment consist of the following:
Computer equipment	$	2,556		$	3,399
Computer software		641			849
Research equipment		4,986			5,807
Furniture and fixtures		1,040			1,544
Leasehold improvements		2,722			1,931

		11,945			13,530
Less accumulated depreciation and amortization		(9,507	)		(8,501	)

	$	2,438		$	5,029

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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