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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |  |
Percentage of total revenue accounted for percentage-of-completion revenue, less than (in percentage) |  | 0.10%
Product sales as a percentage of total revenue (in percentage) | 95.00% | 95.00%
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 19,416 | $ 43,256
Operating expenses (excluding depreciation and amortization): | 22,841 | 43,968
Products |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 18,800 | 42,072
Operating expenses (excluding depreciation and amortization): | 22,534 | 43,447
Services |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 616 | 1,184
Operating expenses (excluding depreciation and amortization): | $ 307 | $ 521

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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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 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: 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=118956577&loc=SL49130545-203045 + Details
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