Subsequent Events (Details) - Oct. 09, 2018 - Subsequent Event € in Thousands, $ in Thousands	USD ($)	EUR (€)
Subsequent Event [Line Items]
Payments to acquire intangible assets	$ 6,300	€ 5,500
Indemnity holdback	$ 850	€ 750

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration