Subsequent Event (Details) - Subsequent Event	1 Months Ended
Feb. 28, 2018 USD ($)
Subsequent Event [Line Items]
Escrow disbursements made during the period	$ 750,000
TheraVectys SA
Subsequent Event [Line Items]
Escrow disbursements made during the period	$ 5,250,000

Cash received for the settlement of litigation during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration