Class Of Warrant Or Right, Expiration Period

No definition available.

Name:	asys_ClassOfWarrantOrRightExpirationPeriod
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Period Type:	duration

- Definition

Common Stock, Collective Ownership Threshold For Joint Filers

+ References

No definition available.

+ Details

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Namespace Prefix:	asys_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Common Stock, Minimum Percent Ownership For Exercise Of Rights

+ References

No definition available.

+ Details

Name:	asys_CommonStockMinimumPercentOwnershipForExerciseOfRights
Namespace Prefix:	asys_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Shareholder Rights Plan (Details) - $ / shares	Oct. 08, 2015	Dec. 15, 2008	Mar. 31, 2018	Mar. 28, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Common stock, par value (USD per share)			$ 0.01	$ 0.01	$ 0.01
Minimum percent ownership of common stock for exercise of rights		15.00%
Series A Preferred Stock
Class of Stock [Line Items]
Common stock, par value (USD per share)		$ 0.01
Number of securities called by warrants or rights (in shares)		0.001
Exercise price of rights (USD per share)		$ 51.60
Rights expiration period		10 years
Collective ownership threshold for joint filers	19.90%