Income Tax (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Operating loss carryforwards		$ 24.3	$ 25.9
Deferred tax assets		7.9	8.4
Valuation allowance		5.2	5.2
Liability for uncertain tax positions		0
Income Tax Credit, Retroactive R&D	$ 0.6