Restructuring Plan (Details Textual) (USD $)	3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Jun. 30, 2012 May 2012 Restructuring Plan [Member]	Sep. 30, 2014 May 2012 Restructuring Plan [Member]	Mar. 31, 2013 February 2013 Restructuring Plan [Member]	Sep. 30, 2013 February 2013 Restructuring Plan [Member]	Sep. 30, 2014 September 2014 Restructuring Plan [Member]
Restructuring and Related Cost, Cost Incurred to Date				$ 1,200,000
Number of Employees Reduced by Restructuring				42		43		42
Restructuring charges	227,000	0	227,000		0		2,254,000	1,678,000
Grid Division related restructuring charges	$ 1,400,000