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Note 13 - Lease Obligations (Details Textual) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finance Lease, Liability, Total	€ 1,044
Finance Lease, Interest Expense	€ 29
Finance Lease, Weighted Average Remaining Lease Term (Year)	3 years 73 days
Finance Lease, Weighted Average Discount Rate, Percent	2.44%
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 186 days
Operating Lease, Weighted Average Discount Rate, Percent	1.56%
Operating Lease, Expense	€ 828	€ 1,002	€ 904
Medical Devices [Member]
Finance Lease, Liability, Total	305
Vehicles and Other IT Equipment [Member]
Finance Lease, Liability, Total	€ 740

X

- Definition

Amount of interest expense on finance lease liability.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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X

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

Weighted average discount rate for finance lease calculated at point in time.

+ References

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X

- Definition

Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
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X

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

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-Publisher FASB
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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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