Debt (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2008	Aug. 06, 2008
Line of Credit Facility, Amount Outstanding	$ 1,589		$ 8,000
Line of Credit Facility, Increase (Decrease), Other, Net		12,850
Line of Credit Facility, Covenant Terms		each expiring on February 1, 2015
Line of Credit Facility, Interest Rate at Period End	3.25%
Line of Credit Facility, Periodic Payment, Principal	18
Line Of Credit Facility Interest Rate Period At One Month	0.22%
Line Of Credit Facility Interest Rate Period At Three Months	0.28%
Line Of Credit Facility Interest Rate Period At Six Months	0.42%
Revolving Credit Facility [Member]
Line of Credit Facility, Amount Outstanding	1,589		8,500
Line of Credit Facility, Interest Rate Description	the Revolver bears interest at a rate per annum equal to the prime lending rate announced from time to time by Sovereign (Prime) plus 0.75% or the LIBOR rate plus 3.50%.
Term Loan Credit Facility [Member]
Line of Credit Facility, Amount Outstanding	$ 4,083		$ 4,350
Line of Credit Facility, Interest Rate Description	The Term Loan bears interest at a rate per annum equal to Prime plus 1.00% or the LIBOR rate plus 3.75%.