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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Net revenues | $ 11,984 | $ 11,758 | $ 37,801 | $ 37,179
Fixed Price [Member] |  |  |  |
Net revenues | 9,407 | 9,738 | 28,247 | 29,642
Cost Reimbursement [Member] |  |  |  |
Net revenues |  |  |  |
Time and Materials [Member] |  |  |  |
Net revenues | 2,577 | 2,020 | 9,554 | 7,537
Treatment [Member] |  |  |  |
Net revenues | 9,103 | 9,355 | 27,207 | 29,019
Treatment [Member] | Fixed Price [Member] |  |  |  |
Net revenues | 9,103 | 9,355 | 27,207 | 29,019
Treatment [Member] | Cost Reimbursement [Member] |  |  |  |
Net revenues |  |  |  |
Treatment [Member] | Time and Materials [Member] |  |  |  |
Net revenues |  |  |  |
Services [Member] |  |  |  |
Net revenues | 2,881 | 2,403 | 10,594 | 8,160
Services [Member] | Fixed Price [Member] |  |  |  |
Net revenues | 304 | 383 | 1,040 | 623
Services [Member] | Cost Reimbursement [Member] |  |  |  |
Net revenues |  |  |  |
Services [Member] | Time and Materials [Member] |  |  |  |
Net revenues | 2,577 | 2,020 | 9,554 | 7,537
Domestic Government [Member] |  |  |  |
Net revenues | 8,400 | 8,546 | 27,329 | 27,683
Domestic Government [Member] | Treatment [Member] |  |  |  |
Net revenues | 6,552 | 7,170 | 19,098 | 21,764
Domestic Government [Member] | Services [Member] |  |  |  |
Net revenues | 1,848 | 1,376 | 8,231 | 5,919
Domestic Commercial [Member] |  |  |  |
Net revenues | 3,155 | 2,708 | 9,656 | 8,672
Domestic Commercial [Member] | Treatment [Member] |  |  |  |
Net revenues | 2,437 | 2,185 | 7,995 | 7,255
Domestic Commercial [Member] | Services [Member] |  |  |  |
Net revenues | 718 | 523 | 1,661 | 1,417
Foreign Government [Member] |  |  |  |
Net revenues | 408 | 483 | 746 | 762
Foreign Government [Member] | Treatment [Member] |  |  |  |
Net revenues | 114 |  | 114 |
Foreign Government [Member] | Services [Member] |  |  |  |
Net revenues | 294 | 483 | 632 | 762
Foreign Commercial [Member] |  |  |  |
Net revenues | 21 | 21 | 70 | 62
Foreign Commercial [Member] | Treatment [Member] |  |  |  |
Net revenues |  |  |  |
Foreign Commercial [Member] | Services [Member] |  |  |  |
Net revenues | $ 21 | $ 21 | $ 70 | $ 62

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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