Common Stock and Preferred Stock - Narrative (Details) $ / shares in Units, $ in Millions	Dec. 31, 2019 USD ($) vote $ / shares shares	Dec. 17, 2019 USD ($)	Dec. 31, 2018 shares
Subsidiary, Sale of Stock [Line Items]
Common stock, shares authorized (in shares)	160,000,000		160,000,000
Common stock, votes per share | vote	1
Preferred stock, shares authorized (in shares)	5,000,000		5,000,000
Preferred stock, shares issued (in shares)	0		0
ATM Offering
Subsidiary, Sale of Stock [Line Items]
Aggregate offering price shares | $		$ 50.0
Sales commission percentage		3.00%
Sale of stock, number of shares issued (in shares)	447,847
Sale of stock, price per share (USD per share) | $ / shares	$ 8.57
Proceeds from stock offering, net of commissions and offering expenses | $	$ 3.5