Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

Our significant financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and September 30, 2017 were as follows:

	June 30, 2018
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Cash equivalents	$	85,382	$	—	$	—	$	85,382
Marketable securities
Certificates of deposit	—		219		—		219
Corporate notes/bonds	52,962		—		—		52,962
U.S. government agency securities	—		991		—		991
Forward contracts	—		4,956		—		4,956
	$	138,344	$	6,166	$	—	$	144,510
Financial liabilities:
Contingent consideration related to acquisitions	$	—	$	—	$	2,100	$	2,100
Forward contracts	—		1,190		—		1,190
	$	—	$	1,190	$	2,100	$	3,290

	September 30, 2017
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial assets:
Cash equivalents	$	49,845	$	—	$	—	$	49,845
Marketable securities
Certificates of deposit	—		240		—		240
Corporate notes/bonds	47,673		—		—		47,673
U.S. government agency securities	—		2,402		—		2,402
Forward contracts	—		1,163		—		1,163
	$	97,518	$	3,805	$	—	$	101,323
Financial liabilities:
Contingent consideration related to acquisitions	$	—	$	—	$	8,400	$	8,400
Forward contracts	—		4,347		—		4,347
	$	—	$	4,347	$	8,400	$	12,747

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Changes in the fair value of Level 3 contingent consideration liability associated with our acquisitions were as follows:

	Contingent Consideration
	(in thousands)
	Kepware			Other		Total
Balance, October 1, 2017	$	8,400		$	—	$	8,400
Addition to contingent consideration	—			2,100		2,100
Payment of contingent consideration	(8,400		)	—		(8,400		)
Balance, June 30, 2018	$	—		$	2,100	$	2,100

	Contingent Consideration
	(in thousands)
	ColdLight			Kepware			Total
Balance, October 1, 2016	$	2,500		$	17,070		$	19,570
Change in present value of contingent consideration	—			392			392
Payment of contingent consideration	(2,500		)	(9,600		)	(12,100		)
Balance, July 1, 2017	$	—		$	7,862		$	7,862