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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2018
Subsequent Events
Subsequent Events	16. Subsequent Events Term Loan Effective January 28, 2019, the Company prepaid in full all outstanding indebtedness under the Term Loan. As of the date of repayment, the Company had approximately $8.9 million in principal and interest outstanding as well as a final payment fee due of $1.0 million. Upon repayment, approximately $0.8 million of unamortized note discounts were recognized as interest expense. See Note 4 – Debt for further information relating to the Term Loan. A&R 2015 Plan Effective January 1, 2019, 501,001 shares were added to the A&R 2015 Plan under the share reserve provision. See Note 9 – Share-Based Compensation.