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Stock-based Compensation	9 Months Ended
Stock-based Compensation	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation	Stock-based Compensation Stock compensation expense for both equity-classified and liability-classified awards for the three and nine months ended September 30, 2017 was $0.5 million and $1.7 million, respectively. Stock compensation expense for both equity-classified and liability-classified awards for the three and nine months ended September 30, 2016 was $1.3 million and $3.2 million, respectively. Stock compensation expense is recognized in cost of goods sold, selling, general and administrative expenses, and research and development expenses. At September 30, 2017, there was $5.0 million of unrecognized compensation cost relating to outstanding unvested equity instruments expected to be recognized over the weighted average period of 2.03 years.