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Note 8 - Income Taxes (Details Textual) | 6 Months Ended
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Jun. 30, 2024 USD ($)
Maximum [Member] |
Unrecognized Tax Benefits, Decrease Resulting from Foreign Taxes | $ 100,000

X
- Definition Amount of decrease in unrecognized tax benefits resulting from foreign taxes. + References No definition available. + Details
Name: | ams_UnrecognizedTaxBenefitsDecreaseResultingFromForeignTaxes
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |