Stock-based Compensation

9 Months Ended

Sep. 30, 2018

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, 2018 was $0.2 million and $2.0 million, respectively. 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 is recognized in cost of goods sold, selling, general and administrative expenses, and research and development expenses. At September 30, 2018, there was $5.2 million of unrecognized compensation cost relating to outstanding unvested equity instruments expected to be recognized over the weighted average period of 1.9 years.