Organization, Business and Basis of Presentation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Organization Consolidation and Presentation of Financial Statements [Line Items]
Operating Income (Loss)	$ 3,307	$ 11,597
Net Income (Loss) Attributable to Parent	$ 1,987	$ 7,172
Earnings Per Share, Diluted	$ 0.10	$ 0.34
Foreign Currency Transaction Gain (Loss), Realized	$ 200
Contracts Accounted for under Percentage of Completion [Member] | Cost Estimate Revision [Member]
Organization Consolidation and Presentation of Financial Statements [Line Items]
Cost Estimate Revision Gross Margin Increase (Decrease) Percentage	(0.60%)	1.50%
Estimate Adjustment [Member]
Organization Consolidation and Presentation of Financial Statements [Line Items]
Operating Income (Loss)	$ (1,500)	$ 3,700
Net Income (Loss) Attributable to Parent	$ (900)	$ 2,300
Earnings Per Share, Diluted	$ (0.05)	$ 0.11