v3.19.2

Convertible Notes - Debt issuance costs and interest expense (Details) - Convertible Notes $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2019 USD ($)
Interest expense related to the Convertible Notes |  |
Contractual interest expense | $ 503 | $ 1,006
Amortization of debt issuance costs | 211 | 419
Amortization of debt discount | 2,042 | 4,048
Total | $ 2,756 | $ 5,473
Effective interest rate of the liability component | 7.10% | 7.10%
Amortization and interest expense capitalized | $ 743 | $ 1,208

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