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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014
Long-term Purchase Commitment [Line Items] |
Total Commitment | $ 45,434,000 us-gaap_LongTermPurchaseCommitmentAmount
Total Cash Deposits | 7,784,000 ams_LongTermPurchaseCommitmentDepositsForFuturePurchase
Proton Beam Units [Member] |
Long-term Purchase Commitment [Line Items] |
Total Commitment | 38,600,000 us-gaap_LongTermPurchaseCommitmentAmount / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = ams_ProtonBeamUnit1Member
Total Cash Deposits | 5,000,000 ams_LongTermPurchaseCommitmentDepositsForFuturePurchase / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = ams_ProtonBeamUnit1Member
Gamma Knife Units [Member] |
Long-term Purchase Commitment [Line Items] |
Total Commitment | 6,834,000 us-gaap_LongTermPurchaseCommitmentAmount / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = ams_GammaKnifeUnitsMember
Total Cash Deposits | $ 2,784,000 ams_LongTermPurchaseCommitmentDepositsForFuturePurchase / us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis = ams_GammaKnifeUnitsMember

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- Definition Deposits for purchase of commitments in future. + References No definition available. + Details
Name: | ams_LongTermPurchaseCommitmentDepositsForFuturePurchase
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ams_GammaKnifeUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ams_ProtonBeamUnit1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |