Restricted Net Assets (Details) - USD ($)	9 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Restricted Net Assets (Textual)
Annual appropriations required by statutory reserve fund, description	At least 10% of after-tax profit, if any, of the relevant PRC VIEs and subsidiary.
Company's restricted net assets	$ 56,037,000	$ 57,324,000

Total assets that cannot be used for operating purposes because of contract or regulatory requirements that are in effect for a period that extends beyond one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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