Pension and Retirement Plans (Tables)

6 Months Ended

Mar. 31, 2018

Compensation and Retirement Disclosure [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

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, 2018								September 30, 2017
	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	$	51	$	51	$	—	$	—	$	62	$	62	$	—	$	—
Pooled funds	8,647		8,647		—		—		8,177		8,177		—		—
Total plan assets	$	8,698	$	8,698	$	—	$	—	$	8,239	$	8,239	$	—	$	—

Schedule of Net Benefit Costs

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

	For the Three Months Ended March 31,
	2018									2017
	Foreign			U.S.			Total			Foreign			U.S.			Total
	(Amounts in thousands)
Pension:
Service cost	$	10		$	—		$	10		$	10		$	—		$	10
Interest cost	121			7			128			93			11			104
Expected return on plan assets	(79		)	—			(79		)	(65		)	—			(65		)
Amortization of:
Amortization of net gain (loss)	64			(1		)	63			91			(1		)	90
Net periodic benefit cost	$	116		$	6		$	122		$	129		$	10		$	139
Post Retirement:
Service cost	$	—		$	10		$	10		$	—		$	10		$	10
Interest cost	—			12			12			—			10			10
Amortization of net gain (loss)	—			(4		)	(4		)	—			4			4
Net periodic cost	$	—		$	18		$	18		$	—		$	24		$	24
	For the Six Months Ended March 31,
	2018									2017
	Foreign			U.S.			Total			Foreign			U.S.			Total
	(Amounts in thousands)
Pension:
Service cost	$	20		$	—		$	20		$	19		$	—		$	19
Interest cost	238			13			251			188			22			210
Expected return on plan assets	(154		)	—			(154		)	(131		)	—			(131		)
Amortization of:
Amortization of net gain (loss)	124			(1		)	123			182			(2		)	180
Net periodic benefit cost	$	228		$	12		$	240		$	258		$	20		$	278
Post Retirement:
Service cost	$	—		$	21		$	21		$	—		$	19		$	19
Interest cost	—			24			24			—			22			22
Amortization of net gain (loss)	—			(10		)	(10		)	—			8			8
Net periodic cost	$	—		$	35		$	35		$	—		$	49		$	49