Note 4 - Other Accrued Liabilities - Other Accrued Liabilities (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Professional services	$ 714,000	$ 472,000
Operating costs	667,000	450,000
Other	1,017,000	304,000
Total other accrued liabilities	$ 2,398,000	$ 1,226,000

The amount of accrued liabilities classified as current not specifically disclosed.

No definition available.

Name:	ams_AccruedLiabilitesOtherCurrent
Namespace Prefix:	ams_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of accrued operating costs classified as current.

+ References

No definition available.

+ Details

Name:	ams_AccruedOperatingCostsCurrent
Namespace Prefix:	ams_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_AccruedProfessionalFeesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_OtherAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant