v3.21.2

Restatement (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Restatement |  |
Financial statements in other receivables and prepayments and additional paid-in-capital | $ 861 | $ 1,461

X
- Definition The amount of over statement in other receivables and prepayments and additional paid-in-capital. + References No definition available. + Details
Name: | sgoc_AmountOfOverstatementInOtherReceivablesAndPrepaymentsAndAdditionalPaidInCapital
Namespace Prefix: | sgoc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccountingChangesAndErrorCorrectionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration