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Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Total | $ 12,658 | $ 12,707
Fixed Price [Member] |  |
Total | 9,049 | 10,132
Cost Reimbursement [Member] |  |
Total |  |
Time and Materials [Member] |  |
Total | 3,609 | 2,575
Treatment [Member] |  |
Total | 8,959 | 10,034
Treatment [Member] | Fixed Price [Member] |  |
Total | 8,959 | 10,034
Treatment [Member] | Cost Reimbursement [Member] |  |
Total |  |
Treatment [Member] | Time and Materials [Member] |  |
Total |  |
Services [Member] |  |
Total | 3,699 | 2,673
Services [Member] | Fixed Price [Member] |  |
Total | 90 | 98
Services [Member] | Cost Reimbursement [Member] |  |
Total |  |
Services [Member] | Time and Materials [Member] |  |
Total | 3,609 | 2,575
Domestic Government [Member] |  |
Total | 9,654 | 9,439
Domestic Government [Member] | Treatment [Member] |  |
Total | 6,536 | 7,371
Domestic Government [Member] | Services [Member] |  |
Total | 3,118 | 2,068
Domestic Commercial [Member] |  |
Total | 2,825 | 3,182
Domestic Commercial [Member] | Treatment [Member] |  |
Total | 2,423 | 2,663
Domestic Commercial [Member] | Services [Member] |  |
Total | 402 | 519
Foreign Government [Member] |  |
Total | 153 | 65
Foreign Government [Member] | Treatment [Member] |  |
Total |  |
Foreign Government [Member] | Services [Member] |  |
Total | 153 | 65
Foreign Commercial [Member] |  |
Total | 26 | 21
Foreign Commercial [Member] | Treatment [Member] |  |
Total |  |
Foreign Commercial [Member] | Services [Member] |  |
Total | $ 26 | $ 21

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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