Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Valuation allowance increase	$ 71,000	$ 108,000
Unrecognized tax benefits	0	0
Income Tax Examination, Penalties and Interest Expense	$ 0	$ 0
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Income tax year, under examination	December 31, 2016, 2015, 2014 and 2013
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Income tax year, under examination	December 31, 2016, 2015, 2014 and 2013