Summary Of Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 AUD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Subsidies received	$ 2.8	$ 2,200,000	$ 0
New Zealand [Member]
Summary Of Significant Accounting Policies [Line Items]
Subsidies received		$ 0