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SUBSEQUENT EVENTS (Details Textual) (USD $)
1 Months Ended 0 Months Ended
Jun. 30, 2014
Apr. 10, 2015
May 05, 2015
Subsequent Event [Line Items]      
Stock Issued During Period, Shares, Issued for Services 200,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices    
Vessel Seller [Member]      
Subsequent Event [Line Items]      
Business Combination, Consideration Transferred   $ 10,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ dei_LegalEntityAxis
= sino_VesselSellerMember
 
Vessel Seller [Member] | Subsequent Event [Member]      
Subsequent Event [Line Items]      
Stock Issued During Period, Shares, Acquisitions   1,200,000us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ dei_LegalEntityAxis
= sino_VesselSellerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Stock Issued During Period, Value, Acquisitions   2,220,000us-gaap_StockIssuedDuringPeriodValueAcquisitions
/ dei_LegalEntityAxis
= sino_VesselSellerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Business Combination, Consideration Transferred   $ 10,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ dei_LegalEntityAxis
= sino_VesselSellerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Business Acquisition, Share Price   $ 1.85us-gaap_BusinessAcquisitionSharePrice
/ dei_LegalEntityAxis
= sino_VesselSellerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Stock Issued During Period, Shares, Issued for Services     500,000us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ dei_LegalEntityAxis
= sino_VesselSellerMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term     18 months