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Commitments, Contingencies and Guarantees (Tables)
12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Minimum rental commitments for the rental of office and production premises and equipment under non-cancellable leases net of sublease income, some of which provide for rental adjustments due to increased property taxes and operating costs for 2012 and thereafter, are as follows:

 

PeriodAmount
2013$37,533
201436,647
201534,839
201630,132
201726,078
2018 and thereafter95,427
$260,656