Commitments and Contingencies	9 Months Ended
Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Obligations – As of June 30, 2017, we had unrecorded purchase obligations in the amount of $44.5 million compared to $11.3 million as of September 30, 2016. These purchase obligations consist of outstanding purchase orders for goods and services. While the amount represents purchase agreements, the actual amounts to be paid may be less if any agreements are renegotiated, canceled or terminated. Development Projects – In fiscal 2014, our wholly owned subsidiary, Tempress Systems, Inc. (“Tempress”), entered into an agreement with the Energy Research Centre of the Netherlands (“ECN”), a Netherlands government-sponsored research institute, for a joint research and development project. Under the terms of the agreement, Tempress sold an ion implanter (“Equipment”) to ECN for $1.4 million. Both Tempress and ECN are performing research and development projects utilizing the Equipment at the ECN facilities. Each party to the agreement will have 100% rights to the results of the projects developed separately by the individual parties. Any results co-developed will be jointly owned. Tempress met its requirement to contribute $1.4 million to the project in the form of installation of the equipment, acceptance testing, project meeting attendance, training, parts, and service, including keeping the equipment in good condition and repair for the first two years of the agreement prior to fiscal 2017. EPA Accrual – As a result of the BTU acquisition, we assumed BTU’s proportional responsibility for clean-up costs at a Superfund site. As an equipment manufacturer, BTU generated and disposed of small quantities of solid waste that were considered hazardous under Environment Protection Agency (“EPA”) regulations. Because BTU historically used a waste disposal firm that disposed of the solid waste at a site that the EPA designated as a Superfund site, BTU was named by the EPA as one of the entities responsible for a portion of the expected clean-up costs. Based on our proportional responsibility, as negotiated with and agreed to by the EPA, our liability related to this matter is less than $0.1 million, which is included in Other Accrued Liabilities on the Condensed Consolidated Balance Sheets as of June 30, 2017 and September 30, 2016. In accordance with the agreement, we established a letter of credit for $0.2 million to the benefit of the EPA for potential cash payments as settlements for our proportional liability. Legal Proceedings – The Company and its subsidiaries are defendants from time to time in actions for matters arising out of their business operations. We do not believe that any matters or proceedings presently pending will have a material adverse effect on our consolidated financial position, results of operations or liquidity. As previously disclosed in our filings with the SEC, shortly after we entered into the merger agreement with BTU, two separate putative stockholder class action complaints (together, the “Stockholder Actions”) were filed in the Court of Chancery of the State of Delaware (the “Delaware Court”). The first was filed on November 4, 2014 and the second on November 17, 2014, on behalf of BTU’s public stockholders, against BTU, members of the BTU board of directors, Amtech and the special purpose merger subsidiary. The Stockholder Actions were consolidated on December 4, 2014. The complaints generally alleged that, in connection with entering into the merger agreement, the BTU board of directors breached certain fiduciary duties owed to BTU’s stockholders. The complaints sought various forms of declaratory and injunctive relief, as well as compensatory damages. On February 18, 2016, the Delaware Court entered the Order approving the Amended Stipulation of Settlement. As a result, the Released Claims were dismissed with prejudice and without any admission of wrongdoing by any of the parties to the Stockholder Actions. Pursuant to the Amended Stipulation of Settlement, BTU, its insurer(s), or its successor(s) in interest are responsible for payment of fees and expenses in the amount of $325,000 which were paid in full on April 1, 2016. The Released Claims are limited solely to claims related to any disclosures (or lack thereof) to BTU’s stockholders concerning the merger and any fiduciary claims concerning the decision to enter into the merger. While we are currently unaware of any other pending or threatened litigation related to additional claims arising from the Stockholder Actions, any future claims are uncertain, so additional harm could potentially result from this litigation, which may cause us to incur substantial costs and divert management’s attention from operational matters.

Commitments and Contingencies

Purchase Obligations – As of June 30, 2017, we had unrecorded purchase obligations in the amount of $44.5 million compared to $11.3 million as of September 30, 2016. These purchase obligations consist of outstanding purchase orders for goods and services. While the amount represents purchase agreements, the actual amounts to be paid may be less if any agreements are renegotiated, canceled or terminated.

Development Projects – In fiscal 2014, our wholly owned subsidiary, Tempress Systems, Inc. (“Tempress”), entered into an agreement with the Energy Research Centre of the Netherlands (“ECN”), a Netherlands government-sponsored research institute, for a joint research and development project. Under the terms of the agreement, Tempress sold an ion implanter (“Equipment”) to ECN for $1.4 million. Both Tempress and ECN are performing research and development projects utilizing the Equipment at the ECN facilities. Each party to the agreement will have 100% rights to the results of the projects developed separately by the individual parties. Any results co-developed will be jointly owned. Tempress met its requirement to contribute $1.4 million to the project in the form of installation of the equipment, acceptance testing, project meeting attendance, training, parts, and service, including keeping the equipment in good condition and repair for the first two years of the agreement prior to fiscal 2017.

EPA Accrual – As a result of the BTU acquisition, we assumed BTU’s proportional responsibility for clean-up costs at a Superfund site. As an equipment manufacturer, BTU generated and disposed of small quantities of solid waste that were considered hazardous under Environment Protection Agency (“EPA”) regulations. Because BTU historically used a waste disposal firm that disposed of the solid waste at a site that the EPA designated as a Superfund site, BTU was named by the EPA as one of the entities responsible for a portion of the expected clean-up costs. Based on our proportional responsibility, as negotiated with and agreed to by the EPA, our liability related to this matter is less than $0.1 million, which is included in Other Accrued Liabilities on the Condensed Consolidated Balance Sheets as of June 30, 2017 and September 30, 2016. In accordance with the agreement, we established a letter of credit for $0.2 million to the benefit of the EPA for potential cash payments as settlements for our proportional liability.

Legal Proceedings – The Company and its subsidiaries are defendants from time to time in actions for matters arising out of their business operations. We do not believe that any matters or proceedings presently pending will have a material adverse effect on our consolidated financial position, results of operations or liquidity.

As previously disclosed in our filings with the SEC, shortly after we entered into the merger agreement with BTU, two separate putative stockholder class action complaints (together, the “Stockholder Actions”) were filed in the Court of Chancery of the State of Delaware (the “Delaware Court”). The first was filed on November 4, 2014 and the second on November 17, 2014, on behalf of BTU’s public stockholders, against BTU, members of the BTU board of directors, Amtech and the special purpose merger subsidiary. The Stockholder Actions were consolidated on December 4, 2014. The complaints generally alleged that, in connection with entering into the merger agreement, the BTU board of directors breached certain fiduciary duties owed to BTU’s stockholders. The complaints sought various forms of declaratory and injunctive relief, as well as compensatory damages.

On February 18, 2016, the Delaware Court entered the Order approving the Amended Stipulation of Settlement. As a result, the Released Claims were dismissed with prejudice and without any admission of wrongdoing by any of the parties to the Stockholder Actions. Pursuant to the Amended Stipulation of Settlement, BTU, its insurer(s), or its successor(s) in interest are responsible for payment of fees and expenses in the amount of $325,000 which were paid in full on April 1, 2016.

The Released Claims are limited solely to claims related to any disclosures (or lack thereof) to BTU’s stockholders concerning the merger and any fiduciary claims concerning the decision to enter into the merger. While we are currently unaware of any other pending or threatened litigation related to additional claims arising from the Stockholder Actions, any future claims are uncertain, so additional harm could potentially result from this litigation, which may cause us to incur substantial costs and divert management’s attention from operational matters.