Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Stream Obligation	Dec. 31, 2018 USD ($)
Disaggregation of Revenue [Abstract]
Revenue	$ 82,975	$ 92,249
Number of broad revenue streams | Stream	3
Contract with Customer, Asset and Liability [Abstract]
Billings in excess of revenue earned (BIE)	$ 7,613	10,609
Revenue recognized in the period from amounts included in Billings in Excess at the beginning of the period	9,089	11,275
Amount of revenue recognized related to performance obligations satisfied in previous periods	$ 2,482
Revenue, Performance Obligation [Abstract]
Number of performance obligations | Obligation	2
Remaining performance obligation	$ 28,016
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-12-31
Revenue, Performance Obligation [Abstract]
Expected period to recognize revenue as performance obligations are satisfied	12 months
Performance Improvement Solutions [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 45,776	42,954
Performance Improvement Solutions [Member] | System Design and Build [Member]
Disaggregation of Revenue [Abstract]
Revenue	19,574	25,948
Performance Improvement Solutions [Member] | Software [Member]
Disaggregation of Revenue [Abstract]
Revenue	2,883	2,883
Performance Improvement Solutions [Member] | Training and Consulting Services [Member]
Disaggregation of Revenue [Abstract]
Revenue	23,320	14,123
Nuclear Industry Training and Consulting [Member]
Disaggregation of Revenue [Abstract]
Revenue	37,199	49,295
Nuclear Industry Training and Consulting [Member] | Training and Consulting Services [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 37,199	$ 49,295