Pension and Retirement Plans (Tables)

6 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

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

	Three Months Ended March 31,
	2020						2019
	U.K.		U.S.		Total		U.K.		U.S.		Total
	(Amounts in thousands)
Pension:
Interest cost	$	66	$	4	$	70	$	92	$	6	$	98
Expected return on plan assets		(74)		—		(74)		(78)		—		(78)
Amortization of past service costs		2		—		2		—		—		—
Amortization of net gain (loss)		48		1		49		38		(1)		37
Net periodic benefit cost	$	42	$	5	$	47	$	52	$	5	$	57
Post Retirement:
Service cost	$	—	$	9	$	9	$	—	$	9	$	9
Interest cost		—		11		11		—		13		13
Amortization of net gain (loss)		—		6		6		—		(5)		(5)
Net periodic cost	$	—	$	26	$	26	$	—	$	17	$	17

	Six Months Ended March 31,
	2020						2019
	U.K.		U.S.		Total		U.K.		U.S.		Total
	(Amounts in thousands)
Pension:
Interest cost	$	132	$	8	$	140	$	183	$	12	$	195
Expected return on plan assets		(148)		—		(148)		(155)		—		(155)
Amortization of past service costs		4		—		4		—		—		—
Amortization of net gain (loss)		96		2		98		76		(2)		74
Net periodic benefit cost	$	84	$	10	$	94	$	104	$	10	$	114
Post Retirement:
Service cost	$	—	$	19	$	19	$	—	$	17	$	17
Interest cost		—		23		23		—		26		26
Amortization of net gain (loss)		—		12		12		—		(9)		(9)
Net periodic cost	$	—	$	54	$	54	$	—	$	34	$	34

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
	March 31, 2020								September 30, 2019
	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	$	179	$	179	$	—	$	—	$	279	$	279	$	—	$	—
Pooled funds		7,928		7,928		—		—		7,959		7,959		—		—
Total plan assets	$	8,107	$	8,107	$	—	$	—	$	8,238	$	8,238	$	—	$	—