Basis of Presentation (Details Textual) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Foreign Currency Transaction Gain, before Tax					$ 133,000
Foreign Currency Transaction Loss, before Tax	$ 393,000	$ 0	$ 534,000	$ 0