Goodwill (Tables)

12 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill for the year ended September 30, 2019 are as follows (in thousands):

	Semiconductor		SiC/LED		Automation			Net Goodwill - Continuing Operations			Discontinued Operations			Net Goodwill
Goodwill	$	5,905	$	728	$	3,595		$	10,228		$	3,367		$	13,595
Accumulated impairment losses		—		—		(3,595	)		(3,595	)		(3,367	)		(6,962	)
Balance at September 30, 2018		5,905		728		—			6,633			—			6,633
Impairment of goodwill		—		—		—			—			—			—
Net exchange differences		—		—		—			—			—			—
Balance at September 30, 2019	$	5,905	$	728	$	—		$	6,633		$	—		$	6,633
Goodwill	$	5,905	$	728	$	3,595		$	10,228		$	3,367		$	13,595
Accumulated impairment losses		—		—		(3,595	)		(3,595	)		(3,367	)		(6,962	)
Balance at September 30, 2019	$	5,905	$	728	$	—		$	6,633		$	—		$	6,633