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Revenue Recognition - Revenues From Contracts With Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | $ 73,182 | $ 84,229 | $ 219,829 | $ 254,484
Western Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 50,484 | 47,069 | 146,600 | 149,458
Eastern Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 12,675 | 17,066 | 33,253 | 57,392
Asia Pacific | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 10,023 | 20,094 |  |
Asia Pacific Segment | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues |  |  | 39,976 | 47,634
Products |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 53,622 | 66,451 | 165,066 | 197,142
Products | Western Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 37,612 | 36,095 | 112,787 | 114,364
Products | Eastern Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 10,217 | 13,377 | 25,505 | 45,772
Products | Asia Pacific | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 5,793 | 16,979 |  |
Products | Asia Pacific Segment | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues |  |  | 26,774 | 37,006
Services |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 19,560 | 17,778 | 54,763 | 57,342
Services | Western Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 12,872 | 10,974 | 33,813 | 35,094
Services | Eastern Hemisphere | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | 2,458 | 3,689 | 7,748 | 11,620
Services | Asia Pacific | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues | $ 4,230 | $ 3,115 |  |
Services | Asia Pacific Segment | Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues |  |  | $ 13,202 | $ 10,628

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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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