Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2011

Convertible Subordinated Debt [Abstract]

Schedule of Convertible Note Redemptions [Table Text Block]

We redeemed the following amounts of our 2.875% Convertible Subordinated Notes:

Date	Amount Redeemed		Redemption Price		Redemption Discount		Related Note Issuance Costs Written Off
February 2009	$	15,000,000	86.50	%	$	2,025,000	$	250,154
June 24, 2010	7,940,000		98.90		89,325		90,904
June 29, 2010	1,200,000		99.00		12,000		13,703
July 8, 2010	1,848,000		99.25		13,860		20,546
Total for 2010	10,988,000				115,185		125,153
Total	$	25,988,000			$	2,140,185	$	375,307