XML 31 R56.htm IDEA: XBRL DOCUMENT v2.4.0.6

MAJOR CUSTOMERS (Details Textual)	12 Months Ended
	Dec. 31, 2012 Customers	Dec. 31, 2011 Customers	Dec. 31, 2010 Customers
Entity-Wide Revenue, Major Customer, Percentage		25.00%	13.00%
Revenue from Number of Customer	19	21	19
Customer 1 [Member]
Entity-Wide Revenue, Major Customer, Percentage	13.00%
Customer 2 [Member]
Entity-Wide Revenue, Major Customer, Percentage	11.00%

X

- Definition

Revenue from number of customers to the entity.

+ References

No definition available.

+ Details

Name:	ams_RevenueFromNumberOfCustomer
Namespace Prefix:	ams_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration