Organization and Significant Accounting Policies (Details 2) (Patents, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Patents
Patents
Estimated useful life	9 years 9 months 18 days
Intangible assets cost	$ 24,900,000	$ 31,400,000
Accumulated amortization	9,400,000	12,800,000
2014	1,000,000
2015	900,000
2016	900,000
2017	800,000
2018	700,000
Patent expenses	10,300,000	3,900,000	4,300,000
Non cash charges related to write-down of patent costs	$ 6,400,000	$ 817,000	$ 1,900,000