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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Net revenues | $ 22,535 | $ 11,984 | $ 51,378 | $ 37,801
Fixed Price [Member] |  |  |  |
Net revenues | 15,445 | 9,407 | 39,310 | 28,247
Time and Materials [Member] |  |  |  |
Net revenues | 7,090 | 2,577 | 12,068 | 9,554
Treatment [Member] |  |  |  |
Net revenues | 10,081 | 9,103 | 30,079 | 27,207
Treatment [Member] | Fixed Price [Member] |  |  |  |
Net revenues | 10,081 | 9,103 | 30,079 | 27,207
Treatment [Member] | Time and Materials [Member] |  |  |  |
Net revenues |  |  |  |
Services [Member] |  |  |  |
Net revenues | 12,454 | 2,881 | 21,299 | 10,594
Services [Member] | Fixed Price [Member] |  |  |  |
Net revenues | 5,364 | 304 | 9,231 | 1,040
Services [Member] | Time and Materials [Member] |  |  |  |
Net revenues | 7,090 | 2,577 | 12,068 | 9,554
Domestic Government [Member] |  |  |  |
Net revenues | 17,692 | 8,400 | 37,669 | 27,329
Domestic Government [Member] | Treatment [Member] |  |  |  |
Net revenues | 7,537 | 6,552 | 21,986 | 19,098
Domestic Government [Member] | Services [Member] |  |  |  |
Net revenues | 10,155 | 1,848 | 15,683 | 8,231
Domestic Commercial [Member] |  |  |  |
Net revenues | 3,010 | 3,155 | 9,897 | 9,656
Domestic Commercial [Member] | Treatment [Member] |  |  |  |
Net revenues | 2,535 | 2,437 | 7,809 | 7,995
Domestic Commercial [Member] | Services [Member] |  |  |  |
Net revenues | 475 | 718 | 2,088 | 1,661
Foreign Government [Member] |  |  |  |
Net revenues | 1,804 | 408 | 3,685 | 746
Foreign Government [Member] | Treatment [Member] |  |  |  |
Net revenues |  | 114 | 220 | 114
Foreign Government [Member] | Services [Member] |  |  |  |
Net revenues | 1,804 | 294 | 3,465 | 632
Foreign Commercial [Member] |  |  |  |
Net revenues | 29 | 21 | 127 | 70
Foreign Commercial [Member] | Treatment [Member] |  |  |  |
Net revenues | 9 |  | 64 |
Foreign Commercial [Member] | Services [Member] |  |  |  |
Net revenues | $ 20 | $ 21 | $ 63 | $ 70

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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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