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Intangible Assets and Royalty Agreement - Estimated Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Sep. 30, 2016
USD ($)
Estimated future amortization expense [Abstract]  
2016 $ 630
2017 2,430
2018 2,075
2019 2,075
2020 1,805
Thereafter 16,396
Net book value $ 25,411