Note 16 - Income Taxes (Details Textual) |
12 Months Ended |
|---|---|
Dec. 31, 2019 | |
| State and Local Jurisdiction [Member] | |
| Open Tax Year | 2012 2013 2014 2015 2016 2017 2018 2019 |
| Foreign Tax Authority [Member] | Australian Taxation Office [Member] | |
| Open Tax Year | 2016 2017 2018 2019 |
| X | ||||||||||
- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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