Date the warrants or rights expire.

No definition available.

Name:	sgoc_ClassOfWarrantOrRighstExpirationDate
Namespace Prefix:	sgoc_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of the share price of shares sold in secondary offering.

+ References

No definition available.

+ Details

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

- Definition

The percentage portion of total shares sold in offering.

+ References

No definition available.

+ Details

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

- Definition

Estimated Warrant Market Price Per Share

+ References

No definition available.

+ Details

Name:	sgoc_EstimatedWarrantMarketPricePerShare
Namespace Prefix:	sgoc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Option To Purchase Warrants Value

+ References

No definition available.

+ Details

Name:	sgoc_OptionToPurchaseWarrantsValue
Namespace Prefix:	sgoc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Warrants Fair Value

+ References

No definition available.

+ Details

Name:	sgoc_WarrantsFairValue
Namespace Prefix:	sgoc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of warrants repurchased.

+ References

No definition available.

+ Details

Name:	sgoc_WarrantsRepurchased
Namespace Prefix:	sgoc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount per share of warrants repurchased.

+ References

No definition available.

+ Details

Name:	sgoc_WarrantsRepurchasedPricePerShare
Namespace Prefix:	sgoc_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The value of warrants repurchased.

+ References

No definition available.

+ Details

Name:	sgoc_WarrantsRepurchasedValue
Namespace Prefix:	sgoc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the warrants or rights are exercisable, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(3))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 3

-Article 4

+ Details

Name:	us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Article 4

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Agreed upon price for the exchange of the underlying asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssumptionsExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

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

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

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

Warrant derivative liability (Underwriters warrants) (Details) (Underwriter Warrants [Member], USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 23, 2010	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2012
Warrant Activity [Line Items]
Option to purchase warrants, value	$ 1sgoc_OptionToPurchaseWarrantsValue
Number of ordianry shares available for purchase by warrants	66,667
Percetnage of total shares sold in the secondary offering	5.00%
Percentage of the price of the shares sold in the secondary offering	120.00%
Expiration date		Dec. 20, 2015
Exercise price of warrant	$ 6.00
Exercisable Date		Jun. 12, 2012
Warrants repurchased			53,096sgoc_WarrantsRepurchased
Warrants repurchased, value			27sgoc_WarrantsRepurchasedValue
Warrants repurchased, price per share			$ 0.50sgoc_WarrantsRepurchasedPricePerShare
Warrants outstanding		13,571		13,571	13,571
Warrants fair value		3sgoc_WarrantsFairValue		2sgoc_WarrantsFairValue
American Binomial Option Valuation Model [Member]
Warrant Activity [Line Items]
Estimated warrant exercise price				$ 6.00
Estimated warrant market price per share				$ 0.62
Expected remaining term				1 year
Expected volatility				176.00%
Risk-free interest rate				0.11%
Warrants fair value				2
Cox-Ross Rubinstein Binomial Model [Member]
Warrant Activity [Line Items]
Estimated warrant exercise price				$ 6.00
Estimated warrant market price per share				$ 0.62
Expected remaining term				1 year
Expected volatility				176.00%
Risk-free interest rate				0.11%
Warrants fair value				$ 2