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SIGNIFICANT RELATED PARTY TRANSACTIONS (Details Textual) | Dec. 31, 2014
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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

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=ams_EmkaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=ams_EwrsLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=ams_GkfSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=ams_UsSubsidiaryOfElektaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |