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SIGNIFICANT RELATED PARTY TRANSACTIONS (Details Textual)
Dec. 31, 2014
GKF Subsidiary [Member]  
Related Party Transaction [Line Items]  
Noncontrolling Interest, Ownership Percentage by Parent 81.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_RelatedPartyTransactionAxis
= ams_GkfSubsidiaryMember
Equity Method Investment, Ownership Percentage 70.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionAxis
= ams_GkfSubsidiaryMember
U.S. Subsidiary Of Elekta [Member]  
Related Party Transaction [Line Items]  
Noncontrolling Interest, Ownership Percentage by Parent 19.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_RelatedPartyTransactionAxis
= ams_UsSubsidiaryOfElektaMember
EWRS LLC [Member]  
Related Party Transaction [Line Items]  
Equity Method Investment, Ownership Percentage 70.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionAxis
= ams_EwrsLlcMember
EMKA [Member]  
Related Party Transaction [Line Items]  
Equity Method Investment, Ownership Percentage 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionAxis
= ams_EmkaMember