XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.19.1

COMMITMENTS AND CONTINGENCIES (Details Textual) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 20, 2018 | Jul. 21, 2017 | Dec. 31, 2018 | Aug. 06, 2018
Commitments And Contingencies [Line Items] |  |  |  |
Long-term Purchase Commitment, Period |  | 5 years | 9 years |
Purchase Agreement Annual Prepayment |  |  |  | $ 1,285,000
Gamma Knife Perfexion System [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Long-term Purchase Commitment, Amount |  |  | $ 4,235,000 |
LINAC system [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Long-term Purchase Commitment, Amount |  |  | 7,523,000 |
Mevion Medical Systems Inc [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Long-term Purchase Commitment, Amount |  |  | 34,000,000 |
Long-term Purchase Commitment, Deposits for Future Purchase |  |  | $ 2,250,000 |
Increase decrease Annual Service Fees | $ 250,000 |  |  |

X
- References No definition available. + Details
Name: | ams_CommitmentsAndContingenciesLineItems
Namespace Prefix: | ams_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase decrease in annual servicing fees + References No definition available. + Details
Name: | ams_IncreaseDecreaseAnnualServiceFees
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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

X
- Definition It represents the amount of purchase agreement annual prepayment. + References No definition available. + Details
Name: | ams_PurchaseAgreementAnnualPrepayment
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

X
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ams_MevionMedicalSystemsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |