Quarterly report pursuant to Section 13 or 15(d)

Revenue - Schedule of Disaggregation of Revenue (Details)

v3.8.0.1
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