v3.21.2

Summary of significant accounting policies (Schedule of Consolidated Subsidiaries) (Details) | Dec. 31, 2020
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SGOCO International |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Beijing SGOCO |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Giant Financial Services Limited ("GFS") |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Apiguru Pty Limited ("Apiguru") |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Giant Connection Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Giant Credit Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Eleven Hau Fook Street Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Paris Sky Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Vision Lane Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
Suns Tower Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%
First Asia Tower Limited |
Entity Information [Line Items] |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%

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- Details
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- Details
Name: | srt_OwnershipAxis=sgoc_BeijingSgocoMember
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- Details
Name: | srt_OwnershipAxis=sgoc_GiantFinancialServicesLimitedGfsMember
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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- Details
Name: | srt_OwnershipAxis=sgoc_ElevenHauFookStreetLimitedMember
Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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- Details
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- Details
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Balance Type: |
Period Type: |