Organization and Summary of Significant Accounting Policies - Recently Issued Accounting Pronouncements Not Yet Adopted (Details) $ in Millions	Dec. 31, 2018 USD ($)
Accounting Standards Update 2016-02 [Member] | Minimum
New Accounting Pronouncements or Change in Accounting Principle
Lease liability	$ 47.0
Accounting Standards Update 2016-02 [Member] | Maximum
New Accounting Pronouncements or Change in Accounting Principle
Lease liability	50.0
Scenario, Adjustment | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle
Cumulative adjustment to decrease accumulated deficit	$ 1.1