Business Segments Information (Tables)

6 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of Business Segment Information

Information concerning our business segments is as follows, in thousands:

	Three Months Ended March 31,						Six Months Ended March 31,
	2020			2019			2020			2019
Net Revenues:
Semiconductor	$	11,992		$	16,053		$	29,224		$	35,013
SiC/LED		2,468			3,273			5,285			6,256
Non-segment related		—			1,307			643			2,589
	$	14,460		$	20,633		$	35,152		$	43,858
Operating income (loss):
Semiconductor	$	(18	)	$	1,732		$	2,704		$	4,477
SiC/LED		421			877			955			1,646
Non-segment related		(1,375	)		(1,361	)		(2,994	)		(4,211	)
	$	(972	)	$	1,248		$	665		$	1,912

	March 31, 2020		September 30, 2019
Identifiable Assets:
Semiconductor	$	55,337	$	56,855
SiC/LED		8,253		7,779
Non-segment related*		36,008		39,088
Held-for-sale assets**		—		22,755
	$	99,598	$	126,477

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

** See Note 4 for additional information on held-for-sale assets.