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Short Term Borrowings and Credit Lines Narrative (Details) | Jun. 30, 2019 USD ($) | Jun. 30, 2019 EUR (€) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 EUR (€)
--- | --- | --- | --- | --- | --- | ---
Line of Credit Facility [Line Items] |  |  |  |  |  |
Long-term Line of Credit | $ | $ 0 |  | $ 0 |  | $ 0 |
Minimum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End | 87.50% | 87.50% |  |  |  |
Maximum [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End | 162.50% | 162.50% |  |  |  |
European Subsidiary [Member] | Unsecured And Uncommitted Credit Line1 [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Long-term Line of Credit | € |  | € 0 |  | € 0 |  | € 0
Line of Credit Facility, Interest Rate at Period End | 75.00% | 75.00% |  |  |  |

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- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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