v2.4.1.9
Organization and description of business (Acquisition of Honesty Group Holdings Limited) (Details)
1 Months Ended
Mar. 12, 2010
Dec. 31, 2014
Dec. 31, 2013
Mar. 11, 2010
Business Acquisition [Line Items]        
Common stock, shares outstanding 16,094,756us-gaap_CommonStockSharesOutstanding 17,414,861us-gaap_CommonStockSharesOutstanding 17,660,356us-gaap_CommonStockSharesOutstanding 5,299,126us-gaap_CommonStockSharesOutstanding
Common stock, shares issued 16,094,756us-gaap_CommonStockSharesIssued 17,414,861us-gaap_CommonStockSharesIssued 17,660,356us-gaap_CommonStockSharesIssued 5,299,126us-gaap_CommonStockSharesIssued
Honesty Group [Member]        
Business Acquisition [Line Items]        
Shares exchange transaction with Honesty Group 14,300,000us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= sgoc_HonestyGroupMember
     
Ownership percentage 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= sgoc_HonestyGroupMember