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v3.25.3

Note 7 - Income Taxes (Details Textual) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Unrecognized Tax Benefits, Decrease Resulting from Foreign Taxes | $ 71,000 | $ 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