Rental deposit provided to affiliate.

No definition available.

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Namespace Prefix:	sgoc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

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 210.5-02.3-4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a(1)

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

+ Details

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

- Definition

Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.6-04.2)

-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 2

-Article 6

+ Details

Name:	us-gaap_AdvancesToAffiliate
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

+ Details

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

- Details

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Balance Type:	na
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Details

Name:	sgoc_MajorCustomerAndVendorAxis=sgoc_MajorCustomerOneAndTwoMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	sgoc_MajorCustomerAndVendorAxis=sgoc_MajorCustomerOneTwoAndThreeMember
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- Details

Name:	sgoc_MajorCustomerAndVendorAxis=sgoc_MajorVendorOneAndTwoMember
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- Details

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- Details

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Concentration of risks (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Concentration Risk [Line Items]
Accounts receivable, net of provision for doubtful accounts of $98 and nil, respectively	910us-gaap_AccountsReceivableNetCurrent	48,063us-gaap_AccountsReceivableNetCurrent
Accounts payable, trade	606us-gaap_AccountsPayableCurrent	2,052us-gaap_AccountsPayableCurrent
Deposits in excess of insured limits		13,342us-gaap_CashUninsuredAmount
Advances to Honesty Group		16,888us-gaap_AdvancesToAffiliate
Major Customer One And Two [Member]
Concentration Risk [Line Items]
Accounts receivable, net of provision for doubtful accounts of $98 and nil, respectively	22,334	15,948
Major Customer One Two And Three [Member]
Concentration Risk [Line Items]
Accounts receivable, net of provision for doubtful accounts of $98 and nil, respectively			19,406
Major Vendor One [Member]
Concentration Risk [Line Items]
Accounts payable, trade			1,961
Advances to Honesty Group			9,408
Rental deposit provided to Honesty Group			10
Major Vendor One And Two [Member]
Concentration Risk [Line Items]
Accounts payable, trade
Advances to Honesty Group		32,803
Rental deposit provided to Honesty Group		10
Sales Revenue [Member] \| Major Customer One [Member]
Concentration Risk [Line Items]
Concentration risk percentage	37.80%	22.30%	17.30%
Sales Revenue [Member] \| Major Customer Two [Member]
Concentration Risk [Line Items]
Concentration risk percentage	13.90%	14.20%	9.50%
Sales Revenue [Member] \| Major Customer Three [Member]
Concentration Risk [Line Items]
Concentration risk percentage			10.10%
Sales Revenue [Member] \| Major Customer One And Two [Member]
Concentration Risk [Line Items]
Revenues	22,334	73,452
Concentration risk percentage	51.70%	36.50%
Sales Revenue [Member] \| Major Customer One Two And Three [Member]
Concentration Risk [Line Items]
Revenues			61,547
Concentration risk percentage			36.90%
Accounts Payable [Member] \| Major Vendor One [Member]
Concentration Risk [Line Items]
Concentration risk percentage			77.40%
Accounts Payable [Member] \| Major Vendor One And Two [Member]
Concentration Risk [Line Items]
Concentration risk percentage	64.30%	71.00%
Accounts Payable [Member] \| Major Vendor One And Two [Member] \| Honesty Group [Member]
Concentration Risk [Line Items]
Concentration risk percentage	46.90%	42.40%