Pension and Retirement Plans (Tables)

12 Months Ended

Sep. 30, 2025

Defined Benefit Plan Disclosure [Line Items]

Schedule of net benefit costs

The components of net periodic benefit costs related to the U.S. and international plans are as follows:

	Year ended September 30,
	2025						2024
	U.K.		U.S.		Total		U.K.		U.S.		Total
	(Amounts in thousands)
Pension:
Interest cost	$	431	$	8	$	439	$	440	$	11	$	451
Expected return on plan assets		(519)		—		(519)		(515)		—		(515)
Amortization of past service costs		8		—		8		8		—		8
Amortization of net gain		—		(2)		(2)		—		(5)		(5)
Net periodic (benefit) cost	$	(80)	$	6	$	(74)	$	(67)	$	6	$	(61)
Post Retirement:
Service cost	$	—	$	26	$	26	$	—	$	23	$	23
Interest cost		—		58		58		—		64		64
Amortization of net gain		—		(119)		(119)		—		(172)		(172)
Net periodic benefit	$	—	$	(35)	$	(35)	$	—	$	(85)	$	(85)
Pension:
Increase (decrease) in minimum liability included in other comprehensive income	$	2,736		—	$	2,736	$	(106)	$	6	$	(100)
Post Retirement:
(Decrease) increase in minimum liability included in other comprehensive income		—		(22)		(22)		—		160		160
Total:
Increase (decrease) increase in minimum liability included in other comprehensive income	$	2,736	$	(22)	$	2,714	$	(106)	$	166	$	60

Schedule of Changes in Projected Benefit Obligations

The following table presents an analysis of the changes in 2025 and 2024 in the benefit obligation, the plan assets and the funded status of the plans:

	Years Ended September 30
	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
	(Amounts in thousands)
Pension:
Change in projected benefit obligation (“PBO”)
Balance beginning of year	$	9,165	$	160	$	9,325	$	8,076	$	202	$	8,278
Interest cost		431		8		439		440		11		451
Changes in actuarial assumptions		(518)		(3)		(521)		349		1		350
Foreign exchange impact		17		—		17		788		—		788
Benefits paid		(667)		(34)		(701)		(488)		(54)		(542)
Projected benefit obligation at end of year	$	8,428	$	131	$	8,559	$	9,165	$	160	$	9,325
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	$	11,366	$	—	$	11,366	$	10,034	$	—	$	10,034
Actual (loss) gain on plan assets		(2,746)		—		(2,746)		985		—		985
Company contributions		720		34		754		—		54		54
Foreign exchange impact		(36)		—		(36)		978		—		978
Administrative expenses		(167)		—		(167)		(143)		—		(143)
Benefits paid		(667)		(34)		(701)		(488)		(54)		(542)
Fair value of plan assets at end of year	$	8,470	$	—	$	8,470	$	11,366	$	—	$	11,366
Funded status \ net amount recognized	$	42	$	(131)	$	(89)	$	2,201	$	(160)	$	2,041
Post Retirement:
Change in projected benefit obligation (“PBO”):
Balance beginning of year	$	—	$	1,222	$	1,222	$	—	$	1,147	$	1,147
Service cost		—		26		26		—		23		23
Interest cost		—		58		58		—		64		64
Changes in actuarial assumptions		—		(141)		(141)		—		(12)		(12)
Projected benefit obligation at end of year	$	—	$	1,165	$	1,165	$	—	$	1,222	$	1,222
Funded status \ net amount recognized	$	—	$	(1,165)	$	(1,165)	$	—	$	(1,222)	$	(1,222)

Schedule of Amounts Recognized in Balance Sheet

The amounts recognized in the consolidated balance sheet consist of:

	Years Ended September 30
	2025						2024
	Foreign		U.S.		Total		Foreign		U.S.		Total
	(Amounts in thousands)
Pension:
Accrued benefit asset (liability)	$	42	$	(131)	$	(89)	$	2,201	$	(160)	$	2,041
Deferred tax		—		23		23		—		23		23
Accumulated other comprehensive income		3,031		12		3,043		212		12		224
Net amount recognized	$	3,073	$	(96)	$	2,977	$	2,413	$	(125)	$	2,288
Post Retirement:
Accrued benefit liability	$	—	$	(1,165)	$	(1,165)	$	—	$	(1,222)	$	(1,222)
Deferred tax		—		221		221		—		212		212
Accumulated other comprehensive loss		—		(158)		(158)		—		(144)		(144)
Net amount recognized	$	—	$	(1,102)	$	(1,102)	$	—	$	(1,154)	$	(1,154)
Total pension and post retirement:
Accrued benefit asset (liability)	$	42	$	(1,296)	$	(1,254)	$	2,201	$	(1,382)	$	819
Deferred tax		—		244		244		—		235		235
Accumulated other comprehensive income (loss)		3,031		(146)		2,885		212		(132)		80
Net amount recognized	$	3,073	$	(1,198)	$	1,875	$	2,413	$	(1,279)	$	1,134
Accumulated Benefit Obligation:
Pension	$	(8,428)	$	(131)	$	(8,559)	$	(9,165)	$	(160)	$	(9,325)
Post Retirement		—		(1,165)		(1,165)		—		(1,222)		(1,222)
Total accumulated benefit obligation	$	(8,428)	$	(1,296)	$	(9,724)	$	(9,165)	$	(1,382)	$	(10,547)

Schedule of accrued benefit liability

Accrued benefit assets and liabilities reported as:

	September 30,
	2025		2024
	(Amounts in thousands)
Pension benefits assets	$	42	$	2,201
Current accrued benefit liability	$	77	$	76
Non-current accrued benefit liability		1,219		1,306
Total accrued benefit liability	$	1,296	$	1,382

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid (amounts in thousands):

Fiscal year ending September 30:	(Amounts in thousands)
2026	$	639
2027	$	675
2028	$	716
2029	$	716
2030	$	729
Thereafter	$	1,273

Schedule of fair value of plan assets

The fair value of the assets held by the U.K. pension plan by asset category are as follows:

	Fair Values as of
	September 30, 2025								September 30, 2024
	Fair Value Measurements Using Inputs Considered as								Fair Value Measurements Using Inputs Considered as
Asset Category	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
	(Amounts in thousands)
Cash on deposit	$	42	$	42	$	—	$	—	$	65	$	65	$	—	$	—
Fixed income		—		—		—		—		10,388		8,714		1,674		—
Buy-in contract		8,428		—		—		8,428		—		—		—		—
Equity		—		—		—		—		913		263		650		—
Total plan assets	$	8,470	$	42	$	—	$	8,428	$	11,366	$	9,042	$	2,324	$	—

Projected Benefit Obligations

Defined Benefit Plan Disclosure [Line Items]

Schedule of Assumptions Used

The following table provides the weighted average actuarial assumptions used to determine the actuarial present value of projected benefit obligations at:

	Domestic				International
	September 30,				September 30,
	2025		2024		2025		2024
Discount rate:	5.32	%	4.86	%	5.6	%	5.0	%
Expected return on plan assets:					5.6	%	4.7	%

Net Periodic Benefit Cost

Defined Benefit Plan Disclosure [Line Items]

Schedule of Assumptions Used

The following table provides the weighted average actuarial assumptions used to determine net periodic benefit cost for years ended:

	Domestic				International
	September 30,				September 30,
	2025		2024		2025		2024
Discount rate:	4.86	%	5.62	%	5.6	%	5.0	%
Expected return on plan assets:					5.6	%	4.7	%