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Note 9 - GKCE Acquisition (Details Textual)	Jun. 12, 2020 USD ($)
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Trade Names [Member]
Indefinite-lived Intangible Assets Acquired	$ 78,000

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- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_BusinessAcquisitionAxis=ams_GammaKnifeCenterEcuadorSAGKCEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: