v3.19.3

Convertible Notes - Debt issuance costs and interest expense (Details) - Convertible Notes $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2019 USD ($)
Interest expense related to the Convertible Notes |  |
Contractual interest expense | $ 503 | $ 1,509
Amortization of debt issuance costs | 213 | 632
Amortization of debt discount | 2,079 | 6,127
Total | $ 2,795 | $ 8,268
Effective interest rate of the liability component | 7.10% | 7.10%
Amortization and interest expense capitalized | $ 740 | $ 1,948

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