Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

The below table is a summary of all transactions by and between the Company and AHH in 2012, 2011, and 2010.

	Year Ended December 31,
	2012 (a)		2011 (a)		2010
Payments from the Company to AHH:
Physician and clinical research expenses	$	125	$	209	$	114
Company revenue derived from AHH	$	690	$	912	$	1,064

(a) Due to Dr. Diethrich's retirement from the Board of Directors of AHH in October 2010, AHH was not considered to be a related-party to the Company during 2012 and 2011, and is presented for comparative purposes only.