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Business Segments | 12 Months Ended
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Sep. 30, 2020
Segment Reporting [Abstract] |
Business Segments | 18. Business Segments After announcing the planned divestiture of our Solar segment (see Note 2), we conducted an evaluation of our organizational structure. Beginning with the second quarter of fiscal 2019, we made changes to our reportable segments. With the divesture of our Automation segment in the first quarter of fiscal 2020, we further evaluated our organizational structure and concluded that we have two reportable business segments following the divestiture. Prior period amounts have been revised to conform to the current period segment reporting structure. Our two reportable segments are as follows: Semiconductor–We design, manufacture, sell and service thermal processing equipment and related controls for use by leading semiconductor manufacturers, and in electronics, automotive and other industries. SiC/LED–We produce consumables and machinery for lapping (fine abrading) and polishing of materials, such as sapphire substrates, optical components, silicon wafers, numerous types of crystal materials, ceramics and metal components. We formerly referred to our SiC/LED segment as “Polishing.” Information concerning our business segments is as follows (in thousands):
|  | Years Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Net revenue: |  |  |  |  |  |  |  |  |  |  |  |
Semiconductor |  | $ | 54,516 |  |  | $ | 66,455 |  |  | $ | 80,163 |
SiC/LED |  |  | 10,304 |  |  |  | 13,682 |  |  |  | 13,761 |
Non-segment related |  |  | 643 |  |  |  | 4,898 |  |  |  | 6,129 |
|  | $ | 65,463 |  |  | $ | 85,035 |  |  | $ | 100,053 |
Operating income (loss): |  |  |  |  |  |  |  |  |  |  |  |
Semiconductor |  | $ | 4,168 |  |  | $ | 8,744 |  |  | $ | 11,848 |
SiC/LED |  |  | 684 |  |  |  | 3,641 |  |  |  | 3,672 |
Non-segment related |  |  | (5,337 | ) |  |  | (7,469 | ) |  |  | (9,448 | )
|  | $ | (485 | ) |  | $ | 4,916 |  |  | $ | 6,072 |
|  | Years Ended September 30, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |  |
Semiconductor |  | $ | 912 |  |  | $ | 379 |  |  | $ | 352 |
SiC/LED |  |  | 1,724 |  |  |  | 171 |  |  |  | 603 |
Non-segment related |  |  | 39 |  |  |  | 33 |  |  |  | 39 |
|  | $ | 2,675 |  |  | $ | 583 |  |  | $ | 994 |
Depreciation and amortization expense: |  |  |  |  |  |  |  |  |  |  |  |
Semiconductor |  | $ | 821 |  |  | $ | 828 |  |  | $ | 715 |
SiC/LED |  |  | 197 |  |  |  | 136 |  |  |  | 136 |
Non-segment related |  |  | 60 |  |  |  | 161 |  |  |  | 202 |
|  | $ | 1,078 |  |  | $ | 1,125 |  |  | $ | 1,053 |
|  | September 30, 2020 |  |  | September 30, 2019 |
Identifiable assets: |  |  |  |  |  |  |  |
Semiconductor |  | $ | 51,648 |  |  | $ | 56,855 |
SiC/LED |  |  | 12,717 |  |  |  | 7,779 |
Non-segment related* |  |  | 37,733 |  |  |  | 39,088 |
Held-for-sale assets** |  |  | — |  |  |  | 22,755 |
|  | $ | 102,098 |  |  | $ | 126,477 |
* | Non-segment related assets include cash, accounts receivable, inventory, property and other assets.
** | See Note 2 for additional information on held-for-sale assets.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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