Derivative Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2020

Derivative [Line Items]

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

	Year Ended September 30,
	2020			2019			2018
Interest rate swap	$	(5,155	)	$	—		$	—
Interest rate cap	(19		)	19			—
Foreign currency forward contracts	(201		)	(443		)	(118		)
	$	(5,375	)	$	(424	)	$	(118	)

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

		Year Ended September 30,
	Location of (Loss) Gain	2020			2019			2018
Foreign currency forward contracts	Cost of product sales and services	$	(8	)	$	(309	)	$	(76	)
Foreign currency forward contracts	General and administrative expense	(192		)	82			18
Foreign currency forward contracts	Selling and marketing expense	28			—			—
Foreign currency forward contracts	Research and development expense	—			(271		)	(39		)
Interest rate swap	Interest expense	(486		)	—			—
		$	(658	)	$	(498	)	$	(97	)

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, 2020		September 30, 2019
Interest rate cap	Prepaid and other current assets	$	—	$	19
Foreign currency forward contracts	Prepaid and other current assets	$	133	$	269

		Liability Derivative
	Balance Sheet Location	September 30, 2020		September 30, 2019
Interest rate swap	Accrued expenses and other current liabilities	$	4,669	$	—
Foreign currency forward contracts	Accrued expenses and other current liabilities	$	47	$	154

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, 2020		September 30, 2019
Foreign currency forward contracts	Prepaid and other current assets	$	7	$	9