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v3.22.2.2

Nature of Business and Liquidity (Details) | Jun. 30, 2022 $ / shares
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Merger Agreement [Member] |
Nature of Business and Liquidity (Details) [Line Items] |
Common stock, par value | $ 0.0001

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- Definition Common stock, par value. + References No definition available. + Details
Name: | amst_CommonStockParValue
Namespace Prefix: | amst_
Data Type: | dtr:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | amst_EquityIncentivePlanAxis=amst_MergerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |