Common Stock, Preferred Stock and Equity Plans - Common Stock and Preferred Stock (Details)	12 Months Ended
	Dec. 31, 2019 vote shares	Dec. 31, 2018 shares
Equity [Abstract]
Common stock, shares authorized (shares)	500,000,000	500,000,000
Common stock, number of votes per share | vote	1
Preferred stock, shares authorized (shares)	1,000,000	1,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0