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Segment Information and Foreign Operations | 3 Months Ended
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Mar. 31, 2023
Segment Information and Foreign Operations |
Segment Information and Foreign Operations | Note 11. Segment Information and Foreign Operations ​ Segment Information ​ We operate in one segment for the design, development, manufacture and distribution of high-performance compound and single element semiconductor substrates and sale of raw materials integral to these substrates. In accordance with ASC Topic 280, Segment Reporting, our chief operating decision maker has been identified as the Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the Company. Since we operate in one segment, all financial segment and product line information can be found in the condensed consolidated financial statements. ​ Product Information ​ The following table represents revenue amounts (in thousands) by product type: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​ | ​
​ | ​ | March 31, | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  |  |
Product Type: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Substrates | ​ | $ | 13,489 | ​ | $ | 31,745 | ​ | ​ | ​
Raw Materials and Other | ​ |  | 5,916 | ​ |  | 7,908 | ​ | ​ | ​
Total | ​ | $ | 19,405 | ​ | $ | 39,653 | ​ | ​ | ​
​ Geographical Information ​ The following table represents revenue amounts (in thousands) reported for products shipped to customers in the corresponding geographic region: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | ​ | ​
​ | ​ | March 31, | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  |  |
Geographical region: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
China | ​ | $ | 8,102 | ​ | $ | 17,480 | ​ | ​ | ​
Taiwan | ​ | ​ | 2,471 | ​ | ​ | 6,859 | ​ | ​ | ​
Japan | ​ |  | 1,535 | ​ |  | 2,807 | ​ | ​ | ​
Asia Pacific (excluding China, Taiwan and Japan) | ​ | ​ | 1,091 | ​ | ​ | 1,756 | ​ | ​ | ​
Europe (primarily Germany) | ​ | ​ | 3,570 | ​ | ​ | 6,394 | ​ | ​ | ​
North America (primarily the United States) | ​ |  | 2,636 | ​ |  | 4,357 | ​ | ​ | ​
Total | ​ | $ | 19,405 | ​ | $ | 39,653 | ​ | ​ | ​
​ Long-lived assets consist primarily of property, plant and equipment and operating lease right-of-use assets, and are attributed to the geographic location in which they are located. Long-lived assets, net of depreciation, by geographic region were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ |  | 2023 |  | 2022 |
Long-lived assets by geographic region, net of depreciation: | ​ | ​ | ​ | ​ | ​ | ​ | ​
North America | ​ | $ | 273 | ​ | $ | 346 | ​
China | ​ |  | 163,910 | ​ |  | 162,432 | ​
​ | ​ | $ | 164,183 | ​ | $ | 162,778 | ​
​ Significant Customers ​ No customers represented 10% of our revenue for the three months ended March 31, 2023 and one customer, Landmark, represented 10% of our revenue for the three months ended March 31, 2022. Our top five customers, although not the same five customers for each period, represented 28% and 29% of our revenue for the three months ended March 31, 2023 and 2022, respectively. ​ We perform ongoing credit evaluations of our customers’ financial condition, and limit the amount of credit extended when deemed necessary, but generally do not require collateral. No customers accounted for 10% of our accounts receivable balance as of March 31, 2023, and two customers accounted for more than 10% of our accounts receivable as of December 31, 2022.

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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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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=123359005&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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