Stockholders' Equity - Preferred Stock (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares shares	Dec. 31, 2018 shares
Class of Stock
Number of preferred shares authorized in amendment (in shares)	5,000,000
Series A Preferred Stock
Class of Stock
Number of preferred shares authorized in amendment (in shares)	2,000,000
Preferred stock issued (in shares)	2,000,000	2,000,000
Preferred stock outstanding (in shares)	2,000,000	2,000,000
Dividend price (in dollars per share) | $ / shares	$ 22.85
Series A Preferred Stock | Founders Entities
Class of Stock
Convertible preferred stock conversion ratio	1
Extension period for conversion	3 years