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Revenue from Contracts with Customers (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Schedule of disaggregation of revenue | Revenue and operating expenses (excluding depreciation and amortization) disaggregated by revenue source are as follows (in thousands):
| Three months ended September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Revenue: |  |  |  |  |  |  |
Products | $ | 21,031 |  |  | $ | 52,510 |  |  | $ | 96,733 |  |  | $ | 130,652 |
Services | 848 |  |  | 1,199 |  |  | 3,094 |  |  | 3,672 |
| $ | 21,879 |  |  | $ | 53,709 |  |  | $ | 99,827 |  |  | $ | 134,324 |
Operating expenses (excluding depreciation and amortization): |  |  |  |  |  |
Products | $ | 23,637 |  |  | $ | 44,048 |  |  | $ | 105,440 |  |  | $ | 114,365 |
Services | 52 |  |  | 1,599 |  |  | 1,153 |  |  | 3,483 |
| $ | 23,689 |  |  | $ | 45,647 |  |  | $ | 106,593 |  |  | $ | 117,848 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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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