Commitments and Contingencies (Details)	0 Months Ended
Dec. 27, 2012 sqft
Commitments and Contingencies Disclosure [Abstract]
Lease square footage	110,000

The estimated rental square footage stated in the executed lease for the Company's future corporate headquarters expected to commence in 2015.

No definition available.

Name:	amsg_ContractualObligationLeaseSquareFootage
Namespace Prefix:	amsg_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration