v2.4.1.9

Organization and description of business (Additional Information) (Details) (TCL Brand Products [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
TCL Brand Products [Member]
Product Or Service [Line Items]
Revenues		$ 2,762us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = sgoc_TclBrandProductsMember	$ 3,588us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = sgoc_TclBrandProductsMember

X

- Details

Name:	sgoc_ProductOrServiceLineItems
Namespace Prefix:	sgoc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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