Income Taxes - Carryforwards (Details) $ in Millions	Dec. 31, 2015 USD ($)
Federal
Operating Loss Carryforwards [Line Items]
Income tax credit carryforwards	$ 3.2
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	71.1
Income tax credit carryforwards	0.5
Switzerland
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0.3
Italy
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 0.8