Postretirement Benefits (Tables)

12 Months Ended

Sep. 30, 2020

Compensation and Retirement Disclosure [Abstract]

Funded Status and Amounts Recognized in Consolidated Balance Sheet

	September 30,
	2020		2019
Benefit obligation at beginning of fiscal year	$	11,915	$	11,144
Benefit obligation through acquisition		—		—
Service cost		576		599
Interest cost		71		118
Actuarial loss		557		831
Benefits paid		(401)		(811)
Employee contributions		300		273
Settlements paid		—		—
Curtailment gain		—		—
Foreign currency translation		833		(239)
Benefit obligation at end of fiscal year	$	13,851	$	11,915
Fair value of assets at beginning of fiscal year	$	6,574	$	7,078
Fair value of assets through acquisition		—		—
Actual return on plan assets		168		(179)
Disbursements		(401)		(811)
Employer contributions		404		370
Employee contributions		300		273
Settlements paid		—		—
Foreign currency translation		455		(157)
Fair value of assets at end of fiscal year	$	7,500	$	6,574
Accrued benefit obligation	$	6,351	$	5,341

Pension Amounts Recorded Within Account Line Items of Consolidated Balance Sheets

The following table provides pension-related amounts and their classification within the accompanying Consolidated Balance Sheets as of September 30, 2020 and 2019 (in thousands):

	September 30,
	2020		2019
Accrued compensation and benefits	$	419	$	366
Long-term pension liability		5,932		4,975
	$	6,351	$	5,341

Components of Net Pension Cost

The components of the Company’s net pension cost for the fiscal years ended September 30, 2020, 2019 and 2018 are as follows (in thousands):

	Year Ended September 30,
	2020		2019		2018
Service cost	$	576	$	599	$	382
Interest cost		71		118		75
Amortization of losses		12		(18)		5
Expected return on plan assets		(71)		(74)		(66)
Net periodic pension cost	$	588	$	625	$	396
Settlement gain		—		—		—
Total pension cost (gain)	$	588	$	625	$	396

Other changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss

The following changes in Plans’ assets and benefit obligations were recognized in other comprehensive income (loss) as of September 30, 2020 and 2019 (in thousands):

	September 30,
	2020		2019
Net gain	$	(487)	$	(854)
Amortization of net loss		27		30
Total recognized in other comprehensive income (loss)		(460)		(824)
Total recognized in net periodic pension cost and other comprehensive income (loss)	$	128	$	(198)

Weighted-Average Assumptions Used to Determine Net Cost or Pension Obligation

	Year Ended September 30,
	2020		2019		2018
Discount rate	0.37	%	0.55	%	1.04	%
Expected return on plan assets	1.02	%	1.01	%	1.06	%
Expected rate of compensation increases	1.12	%	1.12	%	1.19	%

Asset Allocation of Plan Assets

The allocation of the Plans’ assets at September 30, 2020 is as follows:

	September 30,
	2020
Cash and cash equivalents	2	%
Debt securities	59
Equity securities	19
Other	20
	100	%

Fair Value of Pension Assets by Asset Category and by Level

The fair values of pension assets by asset category and by level at September 30, 2020 are as follows (in thousands):

	As of September 30, 2020
	Level 1		Level 2		Level 3		Total
Swiss Life collective foundation	$	—	$	7,371	$	—	$	7,371
Taiwan collective trust		—		129		—		129
Total	$	—	$	7,500	$	—	$	7,500

The fair values of pension assets by asset category and by level at September 30, 2019 are as follows (in thousands):

	As of September 30, 2019
	Level 1		Level 2		Level 3		Total
Swiss Life collective foundation	$	—	$	6,486	$	—	$	6,486
Taiwan collective trust		—		88		—		88
Total	$	—	$	6,574	$	—	$	6,574

Expected Benefit Payments over the Next Ten Years

Benefit payments expected to be paid over the next five fiscal years and thereafter are as follows (in thousands):

Fiscal year ended September 30,
2021	$	282
2022		303
2023		300
2024		374
2025		384
Thereafter		99