Product Revenue

9 Months Ended

Sep. 30, 2011

Product Revenue [Abstract]

Product Revenue

Note 4 — Product Revenue

The Company differentiates revenue and cost of revenue dependent upon whether the generation is attributable to product sales, rental activity or service activity (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Revenue:
Product	$	53,569	$	25,662	$	125,582	$	63,075
Rental		16,633		11,579		45,590		28,785
Service		4,856		2,741		12,709		7,666
	$	75,058	$	39,982	$	183,881	$	99,526
Cost of revenue:
Product	$	32,883	$	14,406	$	77,989	$	36,204
Rental		7,303		5,185		20,184		15,595
Service		2,580		1,981		7,100		5,320
Depreciation.		1,575		2,343		4,502		6,978
	$	44,341	$	23,915	$	109,775	$	64,097