Shareholders' Equity Components of share-based compensation expense (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	$ 1,916,200	$ 1,507,800	$ 5,471,200	$ 8,164,800
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	19,800	26,000	120,100	71,200
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	102,200	(116,800)	362,400	500,800
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Expense	$ 1,794,200	$ 1,598,600	$ 4,988,700	$ 7,592,800