Note 6 - Property and Equipment, Net

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

6. Property and Equipment, net

Property and equipment consist of the following:

	December 31,
	2014			2013
Laboratory and production equipment	$	48,522		$	34,443
Office, software and computer equipment		15,855			8,649
Furniture and fixtures		1,762			834
Leasehold improvements		5,212			3,952
		71,351			47,878
Less accumulated depreciation		(35,853	)		(25,418	)
	$	35,498		$	22,460

Depreciation and amortization expense for the years ended December 31, 2014, 2013 and 2012 was $10,897, $7,508 and $4,908, respectively.

As of December 31, 2014 and 2013, computer software costs included in property and equipment were $4,582 and $2,815, respectively. Amortization expense of capitalized computer software costs was $614, $283 and $280 for the years ended December 31, 2014, 2013 and 2012, respectively.