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BUSINESS AND BASIS OF PRESENTATION (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Investment In Preferred Stock Fair Value Disclosure	$ 1,383,000	$ 1,383,000
ASHSDB#1, LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%
ASHSDB#2 LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%
GKFDB#1, LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%
GKFDB#2, LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	50.00%

X

- Definition

Investment held in preferred stock during the period.

+ References

No definition available.

+ Details

Name:	ams_InvestmentInPreferredStockFairValueDisclosure
Namespace Prefix:	ams_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant