Revenue

6 Months Ended

Jun. 30, 2012

Revenue [Abstract]

Revenue

Note 4 — Revenue

The Company differentiates revenue and cost of revenue dependent upon whether the source of revenue is attributable to Products, Rentals or Services. Revenue by source is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Revenue:
Product	$	55,156	$	37,040	$	110,924	$	72,012
Rental		16,981		14,823		35,047		28,958
Service		6,166		4,055		11,527		7,853
	$	78,303	$	55,918	$	157,498	$	108,823
Cost of revenue:
Product		32,030		23,438		64,427		45,105
Rental		7,784		6,401		16,359		12,882
Service		3,650		2,355		6,732		4,520
Depreciation		1,814		1,480		3,504		2,927
	$	45,278	$	33,674	$	91,022	$	65,434