Summary of Significant Accounting Policies, Concentration of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Revenue by major customers [Abstract]
Percentage of revenue contributed by major customers (in hundredths)	15.90%
Net Receivables [Member]
Receivable by major customers [Abstract]
Concentration Risk, Benchmark Description	more than 10% of the Company’s consolidated contract receivables
Revenue by major customers [Abstract]
Concentration Risk, Benchmark Description	more than 10% of the Company’s consolidated contract receivables
Net Receivables [Member] | State Nuclear Power Automation System Engineering Co. [Member]
Receivable by major customers [Abstract]
Percentage of receivables contributed by major customers (in hundredths)	0.70%	10.20%
Revenue [Member]
Receivable by major customers [Abstract]
Concentration Risk, Benchmark Description	more than 10% of our consolidated revenue
Revenue by major customers [Abstract]
Concentration Risk, Benchmark Description	more than 10% of our consolidated revenue