Stockholders' Equity (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Stockholders' Equity [Line Items]
Accrued dividends	$ 0	$ 0
Treasury stock, shares	178,889	178,889
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares outstanding	0	0
Anti-takeover provisions period	3 years
2014 Stock Purchase Program [Member]
Stockholders' Equity [Line Items]
Treasury stock, shares	178,669	178,669