Notes Payable and Credit Arrangements Line of Credit Additional Information (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Guidence Line, Utilized	$ 160	$ 675
Line of Credit Facility, Remaining Borrowing Capacity	322
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	556	449
Line of Credit Facility, Interest Rate at Period End	6.50%
Ex-Im Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	$ 33	$ 141
Line of Credit Facility, Interest Rate at Period End	6.50%