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Equity (Details 1) (Warrants issued on emergence date [Member])
Dec. 31, 2014
Warrants issued on emergence date [Member]
 
Warrants and Rights Note Disclosure [Abstract]  
Total warrants 1,634,210us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= semg_WarrantsIssuedOnEmergenceDateMember