Stockholders' Equity (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 vote shares	Dec. 31, 2018 shares
Class of Stock [Line Items]
Common stock, number of votes | vote	1
Preferred stock, shares authorized (in shares) | shares	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares) | shares	0
Common Class B
Class of Stock [Line Items]
Common stock, number of votes | vote	10
Conversion ratio	1