Property and Equipment

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

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



	DECEMBER 31,
	2013			2014

Laboratory equipment	$	1,934		$	2,060
Leasehold improvements	98			135
Computer equipment and software	188			285
Office equipment, furniture, and fixtures	47			124
	2,267			2,604
Less: accumulated depreciation and amortization	(1,972		)	(2,203		)
Total property and equipment, net	$	295		$	401

Depreciation and amortization expense was $548,000, $407,000 and $238,000 for the years ended December 31, 2012, 2013 and 2014, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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