Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2013

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

Property and equipment (in thousands) consisted of the following at December 31, 2013 and 2012:

	2013			2012			Estimated Useful Lives in Years
Equipment	$	13,848		$	11,463		3-7
Leasehold improvements		2,258			1,907		2-5
Furniture & fixtures		1,087			709		7
Computer hardware		2,680			1,926		3
Computer software		3,265			2,547		2-3
Assets not yet placed in service		1,034			344		—
Subtotal		24,172			18,896
Less accumulated depreciation and amortization		(14,478	)		(10,289	)
Property and equipment, net	$	9,694		$	8,607

Depreciation Expense on Property and Equipment, Including Leased Assets

Depreciation expense on property and equipment, including leased assets in each period was as follows (in thousands):

	For the years ended December 31,
	2013		2012		2011
Depreciation expense		4,189		3,636		2,085

Property and Equipment under Capital Leases

Property and equipment under capital leases (in thousands), included above, consists of the following at December 31, 2013 and 2012:

	2013			2012
Equipment	$	7,885		$	6,373
Furniture & fixtures		575			212
Computer hardware		1,607			1,222
Computer software		306			132
Leasehold Improvements		134			134
Assets not yet placed in service		—			—
Subtotal		10,507			8,073
Less accumulated depreciation and amortization		(5,038	)		(3,910	)
Property and equipment under capital leases, net	$	5,469		$	4,163