v3.21.2

Concentrations (Details) | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Number of customer | 1 | 3
Number of Suppliers | 2 | 3
Accounts Receivable [Member] |  |
Concentrations (Details) [Line Items] |  |
Number of customer | 1 | 1
Major Supplier One [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage | 55.40% | 26.00%
Major Supplier Two [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage | 28.60% | 18.00%
Major Supplier Three [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage |  | 16.00%
Major Customer One [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage | 89.70% | 42.00%
Major Customer One [Member] | Accounts Receivable [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage | 87.60% | 87.00%
Major Customer Two [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage |  | 23.00%
Major Customer Three [Member] | Revenue Benchmark [Member] |  |
Concentrations (Details) [Line Items] |  |
Concentrations risks, percentage |  | 22.00%

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- Definition Concentration Risk Percentage 1. + References No definition available. + Details
Name: | sino_ConcentrationRiskPercentage
Namespace Prefix: | sino_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | sino_ConcentrationsDetailsLineItems
Namespace Prefix: | sino_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of customer. + References No definition available. + Details
Name: | sino_NumberOfCustomer
Namespace Prefix: | sino_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of suppliers. + References No definition available. + Details
Name: | sino_NumberOfSuppliers
Namespace Prefix: | sino_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | sino_MajorSupplierAxis=sino_MajorSupplierOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | sino_MajorSupplierAxis=sino_MajorSupplierTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | sino_MajorSupplierAxis=sino_MajorSupplierThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_MajorCustomersAxis=sino_MajorCustomerOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_MajorCustomersAxis=sino_MajorCustomerTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_MajorCustomersAxis=sino_MajorCustomerThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |