Summary of Operations and Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Product Warranty Liability

The following is a summary of activity in accrued warranty expense at our continuing operations (in thousands):

	Years Ended September 30,
	2021			2020			2019
Beginning balance	$	380		$	556		$	644
Additions for warranties issued during the period		250			393			785
Reductions in the liability for payments made under    the warranty		(9	)		(433	)		(693	)
Changes related to pre-existing warranties		(76	)		(121	)		(179	)
Currency translation adjustment		—			(15	)		(1	)
Ending balance	$	545		$	380		$	556

Summary of Research, Development and Engineering Expense

The following is a summary of our research, development and engineering expense (in thousands):

	Years Ended September 30,
	2021		2020			2019
Research, development and engineering	$	5,979	$	3,689		$	3,112
Grants earned		—		(377	)		(44	)
Net research, development and engineering	$	5,979	$	3,312		$	3,068