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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Net revenues | $ 73,459 | $ 49,539
Fixed Price [Member] |  |
Net revenues | 52,526 | 37,846
Time and Materials [Member] |  |
Net revenues | 20,788 | 11,693
Cost Reimbursement [Member] |  |
Net revenues | 145 |
Treatment [Member] |  |
Net revenues | 40,364 | 36,271
Treatment [Member] | Fixed Price [Member] |  |
Net revenues | 40,364 | 36,271
Treatment [Member] | Time and Materials [Member] |  |
Net revenues |  |
Treatment [Member] | Cost Reimbursement [Member] |  |
Net revenues |  |
Services [Member] |  |
Net revenues | 33,095 | 13,268
Services [Member] | Fixed Price [Member] |  |
Net revenues | 12,162 | 1,575
Services [Member] | Time and Materials [Member] |  |
Net revenues | 20,788 | 11,693
Services [Member] | Cost Reimbursement [Member] |  |
Net revenues | 145 |
Domestic Government [Member] |  |
Net revenues | 54,497 | 34,811
Domestic Government [Member] | Treatment [Member] |  |
Net revenues | 29,420 | 25,181
Domestic Government [Member] | Services [Member] |  |
Net revenues | 25,077 | 9,630
Domestic Commercial [Member] |  |
Net revenues | 13,325 | 13,490
Domestic Commercial [Member] | Treatment [Member] |  |
Net revenues | 10,601 | 10,969
Domestic Commercial [Member] | Services [Member] |  |
Net revenues | 2,724 | 2,521
Foreign Government [Member] |  |
Net revenues | 5,488 | 1,133
Foreign Government [Member] | Treatment [Member] |  |
Net revenues | 279 | 114
Foreign Government [Member] | Services [Member] |  |
Net revenues | 5,209 | 1,019
Foreign Commercial [Member] |  |
Net revenues | 149 | 105
Foreign Commercial [Member] | Treatment [Member] |  |
Net revenues | 64 | 7
Foreign Commercial [Member] | Services [Member] |  |
Net revenues | $ 85 | $ 98

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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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