Overview and Summary of Significant Accounting Policies - New Accounting Standard (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Oct. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets, net	$ 5,542
Operating lease liabilities	$ 6,176
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets, net		$ 7,000
Operating lease liabilities		$ 7,000