Organization and Summary of Significant Accounting Policies - Common Stock (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) shares	Jun. 11, 2014 class
Class Of Stock [Line Items]
Number of class of common stock | class		2
Private Placement | Class A Common Stock
Class Of Stock [Line Items]
Non-voting common stock converted to voting common stock in private sale (in shares) | shares	1,727,999
Non-voting common stock converted to voting common stock in private sale | $	$ 18.3