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Note 9 - Commitments and Contingencies (Details Textual) - USD ($) |  | 3 Months Ended
--- | --- | ---
Sep. 04, 2022 | Mar. 31, 2024
Leksell Gamma Knife Icon Systems and Linear Accelerator System [Member] |  |
Long-term Install Service and Purchase Commitment, Amount |  | $ 13,752,000
Long-term Commitment, Cash on Hand to Fund |  | 13,042,000
Long-term Commitment, Line of Credit to Fund |  | 7,000,000
Long-Term Line of Credit |  | 2,400,000
Maintenance And Support Agreement, Mevion Service Agreement [Member] | Mevion Medical Systems Inc [Member] |  |
Purchase Agreement Annual Prepayment | $ 1,865,000 |
Long-term Purchase Commitment, Period (Year) | 1 year |
LINAC System [Member] |  |
Long-Term Service Commitment, Amount |  | $ 14,120,000
LINAC System [Member] | Maximum [Member] |  |
Long-Term Service Commitment, Period (Year) |  | 9 years
LINAC System [Member] | Minimum [Member] |  |
Long-Term Service Commitment, Period (Year) |  | 5 years

X
- Definition The amount of cash on hand to fund long-term commitment. + References No definition available. + Details
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Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of line of credit to fund long-term commitment. + References No definition available. + Details
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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 install service and purchase commitment. + References No definition available. + Details
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Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of long-term service commitment. + References No definition available. + Details
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Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The period of the long-term service commitment. + References No definition available. + Details
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Namespace Prefix: | ams_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of annual prepayments under purchase agreement. + References No definition available. + Details
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Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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Balance Type: | credit
Period Type: | instant

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
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Period Type: | duration

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- Details
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- Details
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- Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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- Details
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