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Revenue - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Disaggregation of Revenue |  |  |  |  |
Customer revenue transferred over-time |  |  | 27.90% | 29.90% |
Total net sales | $ 118,365 | $ 144,848 | $ 381,835 | $ 475,097 |
Contract with customer, assets | 36,891 |  | 36,891 |  | $ 37,032
Contract with customer, liability | 3,606 |  | 3,606 |  | $ 4,472
Contract assets transferred to receivables |  |  | 23,907 |  |
Cash proceeds from liability contract |  |  | 3,286 |  |
Revenue recognized from contract liability | $ 175 | $ 194 | 3,708 | 1,460 |
Over time |  |  |  |  |
Disaggregation of Revenue |  |  |  |  |
Customer revenue transferred over-time | 32.20% | 35.60% |  |  |
Total net sales | $ 38,116 | $ 51,519 | 106,439 | 141,862 |
Over time | Performance Based |  |  |  |  |
Disaggregation of Revenue |  |  |  |  |
Total net sales | 27,316 | 37,488 | 76,606 | 104,309 |
Over time | Delivery Based |  |  |  |  |
Disaggregation of Revenue |  |  |  |  |
Total net sales | $ 10,800 | $ 14,031 | $ 29,833 | $ 37,553 |
Point in time |  |  |  |  |
Disaggregation of Revenue |  |  |  |  |
Customer revenue transferred over-time | 67.80% | 64.40% | 72.10% | 70.10% |
Total net sales | $ 80,249 | $ 93,329 | $ 275,396 | $ 333,235 |

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: 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=121604090&loc=SL49130549-203045 Reference 2: 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=121556615&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
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