Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of intangible assets consisting of license agreements that are carried at cost less accumulated amortization
License agreements	$ 5,985	$ 5,923
Accumulated amortization	(5,956)	(5,806)
License agreements, Net	$ 29	$ 117

Gross carrying amount as of the balance sheet date of certain rights acquired to exercise a certain privilege or pursue a particular business or occupation and which is deemed to have a finite economic life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedLicenseAgreementsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant