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Selling Arrangement - Carrying Amount (Details) - Selling Agreement - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Selling Arrangement    
Gross cost $ 4,000,000 $ 4,000,000
Accumulated amortization (1,883,000) (1,483,000)
Net carrying amount $ 2,117,000 $ 2,517,000