XML 51 R36.htm IDEA: XBRL DOCUMENT v3.7.0.1

ACCOUNTING POLICIES (Details 2)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Break out, Percentage	100.00%	100.00%	100.00%
Property, Plant and Equipment [Member]
Accounting Policies [Line Items]
Break out, Percentage	100.00%	100.00%	100.00%
Domestic [Member] | Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Break out, Percentage	100.00%	100.00%	97.00%
Domestic [Member] | Property, Plant and Equipment [Member]
Accounting Policies [Line Items]
Break out, Percentage	93.00%	93.00%	94.00%
Foreign [Member] | Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Break out, Percentage	0.00%	0.00%	3.00%
Foreign [Member] | Property, Plant and Equipment [Member]
Accounting Policies [Line Items]
Break out, Percentage	7.00%	7.00%	6.00%

X

- References

No definition available.

+ Details

Name:	ams_AccountingPoliciesLineItems
Namespace Prefix:	ams_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_PropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=ams_DomesticMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=ams_ForeignMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: