Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 22,895,000	$ 16,342,000
Revenue, Remaining Performance Obligation	$ 35,570,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability, Current	$ 12,592,000		$ 14,543,000
Contract with Customer, Liability, Revenue Recognized	5,115,000
Contract with Customer, Performance Obligation Satisfied in Previous Period	0
Performance Improvement Solutions [Member] | System Design and Build [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	7,495,000	7,319,000
Performance Improvement Solutions [Member] | Software [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	869,000	456,000
Performance Improvement Solutions [Member] | Training and Consulting Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,537,000	1,895,000
Nuclear Industry Training and Consulting [Member] | Training and Consulting Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 12,994,000	$ 6,672,000