v2.4.1.9

Enterprise-wide geographic reporting (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues by geographic area
REVENUES	$ 43,230us-gaap_Revenues	$ 200,974us-gaap_Revenues	$ 166,701us-gaap_Revenues
China [Member]
Revenues by geographic area
REVENUES	41,321us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CN	177,836us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CN	143,877us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_CN
Hong Kong [Member]
Revenues by geographic area
Percentage of revenue from geographic area	100.00%sgoc_PercentageOfRevenueFromGeographicSegment / us-gaap_StatementGeographicalAxis = country_HK	100.00%sgoc_PercentageOfRevenueFromGeographicSegment / us-gaap_StatementGeographicalAxis = country_HK	99.90%sgoc_PercentageOfRevenueFromGeographicSegment / us-gaap_StatementGeographicalAxis = country_HK
Unites States [Member]
Revenues by geographic area
Percentage of revenue from geographic area			0.10%sgoc_PercentageOfRevenueFromGeographicSegment / us-gaap_StatementGeographicalAxis = country_US
International [Member]
Revenues by geographic area
REVENUES	$ 1,909us-gaap_Revenues / us-gaap_StatementGeographicalAxis = sgoc_InternationalMember	$ 23,138us-gaap_Revenues / us-gaap_StatementGeographicalAxis = sgoc_InternationalMember	$ 22,824us-gaap_Revenues / us-gaap_StatementGeographicalAxis = sgoc_InternationalMember

X

- Definition

Percentage of revenue attributable to each geographic segment.

+ References

No definition available.

+ Details

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Namespace Prefix:	sgoc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ 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)

-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

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- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_HK
Namespace Prefix:
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Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=sgoc_InternationalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: