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v3.20.1

OPERATING LEASES (Details) $ in Thousands | Dec. 31, 2019 USD ($)
--- | ---
Leases, Operating [Abstract] |
2020 | $ 319
2021 | 312
2022 | 319
2023 | 225
2024 | 5
Total Future Minimum Payments Due | $ 1,180

X
- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDue
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Next Twelve Months + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueNextTwelveMonths
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Five + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearFive
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Four + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearFour
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Three + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearThree
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Operating Lease, Liability, Payments, Net Of Sublease Income, Due Year Two + References No definition available. + Details
Name: | ams_LesseeOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearTwo
Namespace Prefix: | ams_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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