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Segment Information and Major Customers | 12 Months Ended
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Dec. 31, 2021
Segment Reporting [Abstract] |
Segment Information and Major Customers | Note 16 – Segment Information and Major Customers The Chief Operating Decision Maker regularly reviews the Company’s financial performance based on two reportable segments: (1) Network Solutions and (2) Services & Support. Network Solutions includes hardware products and software defined next-generation virtualized solutions used in service provider or business networks, as well as prior-generation products. Services & Support includes a portfolio of maintenance, network implementation and solutions integration and managed services, which include hosted cloud services and subscription services. The performance of each segment is evaluated based on gross profit; therefore, selling, general and administrative expenses, research and development expenses, interest and dividend income, interest expense, net investment gain (loss), other income (expense) and income tax (expense) benefit are reported on a Company-wide basis only. There is no inter-segment revenue. Asset information by reportable segment is not produced and, therefore, is not reported. The following table presents information about revenue and gross profit of our reportable segments for each of the years ended December 31, 2021, 2020 and 2019:
|  | 2021 |  |  | 2020 |  |  | 2019 |
(In thousands) |  | Revenue |  |  | Gross Profit |  |  | Revenue |  |  | Gross Profit |  |  | Revenue |  |  | Gross Profit |
Network Solutions |  | $ | 498,834 |  |  | $ | 190,993 |  |  | $ | 438,015 |  |  | $ | 193,789 |  |  | $ | 455,226 |  |  | $ | 191,549 |
Services & Support |  |  | 64,170 |  |  |  | 27,384 |  |  |  | 68,495 |  |  |  | 23,762 |  |  |  | 74,835 |  |  |  | 27,618 |
Total |  | $ | 563,004 |  |  | $ | 218,377 |  |  | $ | 506,510 |  |  | $ | 217,551 |  |  | $ | 530,061 |  |  | $ | 219,167 |
For the years ended December 31, 2021, 2020 and 2019, $1.2 million, $1.4 million and $1.7 million, respectively, of depreciation expense was included in gross profit for our Network Solutions segment. For the years ended December 31, 2021, 2020 and 2019, $14 thousand, $32 thousand and $29 thousand, respectively, of depreciation expense was included in gross profit for our Services & Support segment. Revenue by Category In addition to our reportable segments, revenue is also reported for the following three categories – (1) Access & Aggregation, (2) Subscriber Solutions & Experience and (3) Traditional & Other Products. The following tables disaggregate our revenue by category for the years ended December 31, 2021, 2020 and 2019:
|  | 2021 |
(In thousands) |  | Network Solutions |  |  | Services & Support |  |  | Total |
Access & Aggregation |  | $ | 300,343 |  |  | $ | 43,853 |  |  | $ | 344,196 |
Subscriber Solutions & Experience |  |  | 189,121 |  |  |  | 10,500 |  |  |  | 199,621 |
Traditional & Other Products |  |  | 9,370 |  |  |  | 9,817 |  |  |  | 19,187 |
Total |  | $ | 498,834 |  |  | $ | 64,170 |  |  | $ | 563,004 |
|  | 2020 |
(In thousands) |  | Network Solutions |  |  | Services & Support |  |  | Total |
Access & Aggregation |  | $ | 262,578 |  |  | $ | 50,560 |  |  | $ | 313,138 |
Subscriber Solutions & Experience |  |  | 161,824 |  |  |  | 9,263 |  |  |  | 171,087 |
Traditional & Other Products |  |  | 13,613 |  |  |  | 8,672 |  |  |  | 22,285 |
Total |  | $ | 438,015 |  |  | $ | 68,495 |  |  | $ | 506,510 |
|  | 2019 |
(In thousands) |  | Network Solutions |  |  | Services & Support |  |  | Total |
Access & Aggregation |  | $ | 289,980 |  |  | $ | 58,894 |  |  | $ | 348,874 |
Subscriber Solutions & Experience |  |  | 144,651 |  |  |  | 8,269 |  |  |  | 152,920 |
Traditional & Other Products |  |  | 20,595 |  |  |  | 7,672 |  |  |  | 28,267 |
Total |  | $ | 455,226 |  |  | $ | 74,835 |  |  | $ | 530,061 |
Additional Information The following table presents revenue information by geographic area for the years ended December 31, 2021, 2020 and 2019:
(In thousands) |  | 2021 |  |  | 2020 |  |  | 2019 |
United States |  | $ | 374,600 |  |  | $ | 352,079 |  |  | $ | 300,853 |
Germany |  |  | 65,229 |  |  |  | 74,882 |  |  |  | 78,062 |
United Kingdom |  |  | 56,355 |  |  |  | 13,799 |  |  |  | 2,569 |
Mexico |  |  | 4,616 |  |  |  | 4,087 |  |  |  | 90,795 |
Other international |  |  | 62,204 |  |  |  | 61,663 |  |  |  | 57,782 |
Total |  | $ | 563,004 |  |  | $ | 506,510 |  |  | $ | 530,061 |
Customers comprising more than 10% of revenue can change from year to year. Single customers comprising more than 10% of revenue in 2021 included one customer, at 18%, which was a distributor and was included in both our Network Solutions and Services & Support segments. Single customers comprising more than 10% of revenue in 2020 included three customers at 15%, 12% and 10% and was included in both our Network Solutions and Services & Support segments. Single customers comprising more than 10% of revenue in 2019 included three customers at 19%, 17% and 13% and was included in both our Network Solutions and Services & Support segments. Other than those with more than 10% of revenue disclosed above our next five largest customers can change, and have historically changed, from year-to-year. Th e next five largest customers combined represent ed 38%, 34% and 28% of total revenue in 2021, 2020 and 2019, respectively. As of December 31, 2021, property, plant and equipment, net totaled $55.8 million, which included $53.0 million held in the U.S. and $2.8 million held outside the U.S. As of December 31, 2020, property, plant and equipment, net totaled $62.4 million, which included $58.4 million held in the U.S. and $4.0 million held outside the U.S. Property, plant and equipment, net is reported on a Company-wide, functional basis only.

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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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