Subsequent Events	6 Months Ended
Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events Acquisitions On April 6, 2018, the Company acquired approximately 93% of the outstanding capital stock of Tec-Sem Group AG (“Tec-Sem”), a Switzerland-based manufacturer of semiconductor fab automation equipment with a focus on reticle management. The total cash payment made by the Company was $11.3 million, net of cash acquired, and is subject to working capital adjustments. The remaining 7% non-controlling interest will be acquired by the Company in due course upon completion of subsequent procedural steps. The acquisition is expected to expand the Company’s existing contamination control solutions business within the Brooks Semiconductor Solutions Group segment. The Company will report the results of operations for Tec-Sem in the Brooks Semiconductor Solutions Group segment starting from the acquisition date. The Company has not presented a purchase price allocation related to fair values of assets acquired and liabilities assumed, nor pro-forma information summary for its consolidated results of operations for the fiscal year ended September 30, 2017 and 2016 as if the acquisition occurred on October 1, 2015 because the initial accounting for the acquisition was incomplete on the financial statements issuance date. On April 18, 2018, the Company acquired BioSpeciMan Corporation, a Canadian provider of storage services for biological sample materials. The total cash payment made by the Company was $4.8 million, net of cash acquired and is subject to working capital adjustments. The acquisition is expected to expand customer relationships and geographic reach within the Company’s growing sample management storage services business. The Company will report the results of operations for BioSpeciMan in the Brooks Life Science segment starting from the acquisition date. The Company has not presented a purchase price allocation related to fair values of assets acquired and liabilities assumed, nor pro-forma information summary for its consolidated results of operations for the fiscal year ended September 30, 2017 and 2016 as if the acquisition occurred on October 1, 2015 because the initial accounting for the acquisition was incomplete on the financial statements issuance date. Dividend On April 30, 2018, the Company’s Board of Directors declared a cash dividend of $0.10 per share payable on June 22, 2018 to common stockholders of record as of June 1, 2018. Dividends are declared at the discretion of the Company’s Board of Directors and depend on the Company’s actual cash flows from operations, its financial condition and capital requirements and any other factors the Company’s Board of Directors may consider relevant. Future dividend declarations, as well as the record and payment dates for such dividends, will be determined by the Company’s Board of Directors on a quarterly basis.

17. Subsequent Events

Acquisitions

On April 6, 2018, the Company acquired approximately 93% of the outstanding capital stock of Tec-Sem Group AG (“Tec-Sem”), a Switzerland-based manufacturer of semiconductor fab automation equipment with a focus on reticle management. The total cash payment made by the Company was $11.3 million, net of cash acquired, and is subject to working capital adjustments. The remaining 7% non-controlling interest will be acquired by the Company in due course upon completion of subsequent procedural steps. The acquisition is expected to expand the Company’s existing contamination control solutions business within the Brooks Semiconductor Solutions Group segment. The Company will report the results of operations for Tec-Sem in the Brooks Semiconductor Solutions Group segment starting from the acquisition date. The Company has not presented a purchase price allocation related to fair values of assets acquired and liabilities assumed, nor pro-forma information summary for its consolidated results of operations for the fiscal year ended September 30, 2017 and 2016 as if the acquisition occurred on October 1, 2015 because the initial accounting for the acquisition was incomplete on the financial statements issuance date.

On April 18, 2018, the Company acquired BioSpeciMan Corporation, a Canadian provider of storage services for biological sample materials. The total cash payment made by the Company was $4.8 million, net of cash acquired and is subject to working capital adjustments. The acquisition is expected to expand customer relationships and geographic reach within the Company’s growing sample management storage services business. The Company will report the results of operations for BioSpeciMan in the Brooks Life Science segment starting from the acquisition date. The Company has not presented a purchase price allocation related to fair values of assets acquired and liabilities assumed, nor pro-forma information summary for its consolidated results of operations for the fiscal year ended September 30, 2017 and 2016 as if the acquisition occurred on October 1, 2015 because the initial accounting for the acquisition was incomplete on the financial statements issuance date.

Dividend

On April 30, 2018, the Company’s Board of Directors declared a cash dividend of $0.10 per share payable on June 22, 2018 to common stockholders of record as of June 1, 2018. Dividends are declared at the discretion of the Company’s Board of Directors and depend on the Company’s actual cash flows from operations, its financial condition and capital requirements and any other factors the Company’s Board of Directors may consider relevant. Future dividend declarations, as well as the record and payment dates for such dividends, will be determined by the Company’s Board of Directors on a quarterly basis.