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REVENUE RECOGNITION - Disaggregation of Revenue (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) segment | Sep. 30, 2020 USD ($)
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Number of reportable segment | segment |  |  | 1 |
Revenues | $ 103,509 | $ 94,653 | $ 306,723 | $ 273,696
United States |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 64,326 | 56,185 | 182,673 | 159,862
Europe |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 30,943 | 31,800 | 99,643 | 93,944
Asia-Pacific |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 8,240 | 6,668 | 24,407 | 19,890
Vehicle |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 33,931 | 32,378 | 102,113 | 79,017
Industrial |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 35,269 | 25,307 | 100,351 | 86,882
Medical |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 21,030 | 23,448 | 64,554 | 62,260
Aerospace & Defense |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | 8,291 | 8,844 | 24,313 | 30,503
Other |  |  |  |
Reconciliation of disaggregated revenue to segment revenue as well as revenue by geographical regions |  |  |  |
Revenues | $ 4,988 | $ 4,676 | $ 15,392 | $ 15,034

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: 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 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -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 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: 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 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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