Business Segments (Tables)

12 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Schedule of Business Segment Information

Information concerning our business segments is as follows (in thousands):

	Years Ended September 30,
	2019			2018			2017
Net revenue:
Semiconductor	$	66,455		$	80,163		$	67,237
SiC/LED		13,682			13,761			10,248
Automation		4,898			6,129			5,588
	$	85,035		$	100,053		$	83,073
Operating income (loss):
Semiconductor	$	8,744		$	11,848		$	9,538
SiC/LED		3,641			3,672			2,617
Automation		(786	)		(2,897	)		(724	)
Non-segment related		(6,683	)		(6,551	)		(7,790	)
	$	4,916		$	6,072		$	3,641

	Years Ended September 30,
	2019		2018		2017
Capital expenditures:
Semiconductor	$	379	$	352	$	236
SiC/LED		171		603		12
Automation		22		25		148
Non-segment related		11		14		22
	$	583	$	994	$	418
Depreciation and amortization expense:
Semiconductor	$	828	$	715	$	876
SiC/LED		136		136		73
Automation		103		135		325
Non-segment related		58		67		99
	$	1,125	$	1,053	$	1,373

	September 30, 2019		September 30, 2018
Identifiable assets:
Semiconductor	$	56,855	$	59,744
SiC/LED		7,779		6,545
Automation		2,661		3,586
Non-segment related*		36,427		34,209
Held-for-sale assets**		22,755		45,322
	$	126,477	$	149,406

* Non-segment related assets include cash, property and other assets.

** See Note 2 for additional information on held-for-sale assets.