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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill [Abstract] |
Schedule of Goodwill [Table Text Block] | Goodwill activity related to these acquisitions is included in the table below:
| (Dollars in thousands)
| December 31,
| 2017 |  | 2016
Beginning balance | $ | 5,520 |  |  | $ | 319 |
Acquisition | 14,176 |  |  | 5,231 |
Impact of foreign exchange | (9 | ) |  | (30 | )
Adjustment to prior year allocation (1) | (73 | ) |  | — |
Ending balance | $ | 19,614 |  |  | $ | 5,520 |
(1) | The reduction of $0.1 million in 2017 resulted from a non-cash adjustment to the estimated purchase price allocation to inventory originally recorded in 2016.
Goodwill was tested for impairment in the fourth quarter of 2017 and no adjustment was deemed necessary.

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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