Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 1.0
Net operating loss carryforwards, expiration date	Dec. 31, 2025
Tax Credit Carryforward, Amount	$ 1.4
Research credit carryforwards , expiration date	Jan. 01, 2019
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 6.9
Net operating loss carryforwards, expiration date	Dec. 31, 2018
Tax Credit Carryforward, Amount	$ 1.0