Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Contract costs (Details)

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Summary of Significant Accounting Policies Contract costs (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Jun. 30, 2012
Sep. 30, 2013
Dec. 31, 2012
Contract Start-up Costs [Abstract]        
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]     2.3 1.8
Amortization $ 200 $ 100 $ 700