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Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 AUD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 NZD ($) | Sep. 30, 2021 AUD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 NZD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Amount Of Government Grants And Assistance Receivable |  | $ 0 |  |  | $ 0 |
Australia [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Subsidies received |  | 2,300,000 |  | $ 3.5 | 2,300,000 |
New Zealand [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Subsidies received |  | $ 200,000 | $ 288 |  | $ 200,000 | $ 288

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