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Borrowings (Australian NAB Corporate Term Loan (AU)) (Narrative) (Details) - AUD ($) |  |  | 6 Months Ended
--- | --- | --- | ---
Dec. 29, 2020 | Mar. 15, 2019 | Jun. 30, 2022
Australian NAB Corporate Loan Facility Tier 3 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 100,000,000.0 |
Spread on variable interest rate |  |  | 1.75%
Maturity date |  |  | Dec. 31, 2023
Australian NAB Corporate Loan Facility Tier 3 [Member] | Bank Guarantee Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 5,000,000.0 |
Spread on variable interest rate |  | 1.85% |
Australian NAB Corporate Loan Facility Tier 3 [Member] | Core Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 40,000,000.0 |
Australian NAB Corporate Loan Facility Tier 3 [Member] | Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 60,000,000.0 |
Jindalee, Queensland [Member] | NAB Australian Corporate Term Loan And Revolver Tier 1, 2, 3 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Semi-Annual principal payment |  |  | $ 500,000
Increased amount of credit line | $ 3,000,000.0 |  |

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- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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