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Revenue - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Deferred revenue | $ 1.8 | $ 1.1 |
Product revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue, percent | 64.00% | 59.00% | 57.00%
Rental revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue, percent | 14.00% | 19.00% | 22.00%
Field service and other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue, percent | 22.00% | 22.00% | 21.00%

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
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- Details
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- Details
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