Derivative Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2019

Derivative [Line Items]

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

	Year Ended September 30,
	2019			2018			2017
Interest rate cap	$	19		$	—		$	—
Foreign currency forward contracts	(443		)	(118		)	(70		)
	$	(424	)	$	(118	)	$	(70	)

Derivative Instruments, Gain (Loss) [Table Text Block]

		Year Ended September 30,
	Location of (Loss) Gain	2019			2018			2017
Foreign currency forward contracts	Cost of product sales and services	$	(309	)	$	(76	)	$	(13	)
Foreign currency forward contracts	General and administrative expense	82			18			(35		)
Foreign currency forward contracts	Research and development expense	(271		)	(39		)	(3		)
		$	(498	)	$	(97	)	$	(51	)

Designated as Hedging Instrument [Member]

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		Asset Derivatives
	Balance Sheet Location	September 30, 2019		September 30, 2018
Interest rate cap	Prepaid and other current assets	$	19	$	—
Foreign currency forward contracts	Prepaid and other current assets	269		282

		Liability Derivative
	Balance Sheet Location	September 30, 2019		September 30, 2018
Foreign currency forward contracts	Accrued expenses and other current liabilities	$	154	$	67

Not Designated as Hedging Instrument [Member]

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		Asset Derivative
	Balance Sheet Location	September 30, 2019		September 30, 2018
Foreign currency forward contracts	Prepaid and other current assets	$	9	$	63