CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Revenue
Product	$ 99,730us-gaap_SalesRevenueGoodsNet	$ 93,130us-gaap_SalesRevenueGoodsNet
Services	23,006us-gaap_SalesRevenueServicesNet	23,942us-gaap_SalesRevenueServicesNet
Total revenue	122,736us-gaap_SalesRevenueNet	117,072us-gaap_SalesRevenueNet
Cost of revenue
Product	70,220us-gaap_CostOfGoodsSold	60,736us-gaap_CostOfGoodsSold
Services	13,428us-gaap_CostOfServices	15,445us-gaap_CostOfServices
Total cost of revenue	83,648us-gaap_CostOfRevenue	76,181us-gaap_CostOfRevenue
Gross profit	39,088us-gaap_GrossProfit	40,891us-gaap_GrossProfit
Operating expenses
Research and development	13,489us-gaap_ResearchAndDevelopmentExpense	12,551us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative	29,411	26,135
Restructuring and other charges	2,668us-gaap_RestructuringCosts	747us-gaap_RestructuringCosts
Total operating expenses	45,568us-gaap_OperatingExpenses	39,433us-gaap_OperatingExpenses
Operating income (loss)	(6,480)us-gaap_OperatingIncomeLoss	1,458us-gaap_OperatingIncomeLoss
Interest income	251us-gaap_InvestmentIncomeInterest	246us-gaap_InvestmentIncomeInterest
Interest expense	(102)us-gaap_InterestExpense	0us-gaap_InterestExpense
Other income, net	1,019us-gaap_OtherNonoperatingIncomeExpense	259us-gaap_OtherNonoperatingIncomeExpense
Income (loss) before income taxes and equity in earnings (losses) of equity method investments	(5,312)	1,963
Income tax provision (benefit)	(3,110)us-gaap_IncomeTaxExpenseBenefit	793us-gaap_IncomeTaxExpenseBenefit
Income (loss) before equity in earnings (losses) of equity method investments	(2,202)	1,170
Equity in earnings (losses) of equity method investments	(532)	749
Income (loss) from continuing operations	(2,734)	1,919
Income from discontinued operations, net of tax	0	1,577
Net income (loss)	(2,734)us-gaap_ProfitLoss	3,496us-gaap_ProfitLoss
Net income attributable to noncontrolling interests	0	(48)
Net income (loss) attributable to Brooks Automation, Inc.	$ (2,734)us-gaap_NetIncomeLoss	$ 3,448us-gaap_NetIncomeLoss
Basic net income (loss) per share attributable to Brooks Automation, Inc. common stockholders:
Net income (loss) from continuing operations (USD per share)	$ (0.04)	$ 0.03
Net income from discontinued operations, net of tax (USD per share)	$ 0.00	$ 0.02
Basic net income (loss) per share attributable to Brooks Automation, Inc. (USD per share)	$ (0.04)us-gaap_EarningsPerShareBasic	$ 0.05us-gaap_EarningsPerShareBasic
Diluted net income (loss) per share attributable to Brooks Automation, Inc. common stockholders:
Net income (loss) from continuing operations (USD per share)	$ (0.04)	$ 0.03
Net income from discontinued operations, net of tax (USD per share)	$ 0.00	$ 0.02
Diluted net income (loss) per share attributable to Brooks Automation, Inc. common stockholders (USD per share)	$ (0.04)us-gaap_EarningsPerShareDiluted	$ 0.05us-gaap_EarningsPerShareDiluted
Dividend declared per share (USD per share)	$ 0.10	$ 0.08
Shares used in computing earnings (loss) per share
Basic (shares)	67,126	66,355
Diluted (shares)	67,126	67,126

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