Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net revenues	$ 49,539	$ 49,769
Fixed Price [Member]
Net revenues	37,846	38,464
Time and Materials [Member]
Net revenues	11,693	11,305
Treatment [Member]
Net revenues	36,271	37,750
Treatment [Member] \| Fixed Price [Member]
Net revenues	36,271	37,750
Treatment [Member] \| Time and Materials [Member]
Net revenues
Services [Member]
Net revenues	13,268	12,019
Services [Member] \| Fixed Price [Member]
Net revenues	1,575	714
Services [Member] \| Time and Materials [Member]
Net revenues	11,693	11,305
Domestic Government [Member]
Net revenues	34,811	37,019
Domestic Government [Member] \| Treatment [Member]
Net revenues	25,181	27,956
Domestic Government [Member] \| Services [Member]
Net revenues	9,630	9,063
Domestic Commercial [Member]
Net revenues	13,491	11,594
Domestic Commercial [Member] \| Treatment [Member]
Net revenues	10,970	9,794
Domestic Commercial [Member] \| Services [Member]
Net revenues	2,521	1,800
Foreign Government [Member]
Net revenues	1,133	1,073
Foreign Government [Member] \| Treatment [Member]
Net revenues	114
Foreign Government [Member] \| Services [Member]
Net revenues	1,019	1,073
Foreign Commercial [Member]
Net revenues	104	83
Foreign Commercial [Member] \| Treatment [Member]
Net revenues	6
Foreign Commercial [Member] \| Services [Member]
Net revenues	$ 98	$ 83