v3.21.2

Subsequent Events (Details) - Subsequent Event [Member]	Oct. 03, 2021	Oct. 11, 2021
Subsequent Events (Details) [Line Items]
Equity interest owned, percentage		51.00%
Joint venture , description	the company formed a joint venture, Thor Miner Inc. in Delaware, which is 51% owned by Sino-Global Shipping America Inc. and 49% owned by Highsharp.

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- Definition

Joint venture , description .

+ References

No definition available.

+ Details

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Namespace Prefix:	sino_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	sino_SubsequentEventsDetailsLineItems
Namespace Prefix:	sino_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

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Namespace Prefix:
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Period Type: