Pension and Retirement Plans (Tables)

3 Months Ended

Dec. 31, 2019

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 December 31,
	2019						2018
	U.K.		U.S.		Total		U.K.		U.S.		Total
	(Amounts in thousands)
Pension:
Interest cost	$	66	$	4	$	70	$	91	$	6	$	97
Expected return on plan assets		(74)		—		(74)		(77)		—		(77)
Amortization of past service costs		1		—		1
Amortization of net gain		48		1		49		38		(1)		37
Net periodic benefit cost	$	41	$	5	$	46	$	52	$	5	$	57
Post Retirement:
Service cost	$	—	$	10	$	10	$	—	$	9	$	9
Interest cost		—		12		12		—		13		13
Amortization of net gain		—		6		6		—		(5)		(5)
Net periodic cost	$	—	$	28	$	28	$	—	$	17	$	17

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
	December 31, 2019								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	$	234	$	234	$	—	$	—	$	279	$	279	$	—	$	—
Pooled funds		8,815		8,815		—		—		7,959		7,959		—		—
Total plan assets	$	9,049	$	9,049	$	—	$	—	$	8,238	$	8,238	$	—	$	—