Note 4 - Grant Income (Details Textual) - Jun. 30, 2021 € in Millions, $ in Millions |
USD ($) |
EUR (€) |
|---|---|---|
| Grants Receivable | $ 17 | € 14.2 |
| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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