Net Loss Per Common Share - Narrative (Details) - 1.75% convertible senior notes due 2020 - Convertible debt - $ / shares |
Sep. 30, 2018 |
Dec. 09, 2015 |
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| Debt Instrument [Line Items] | ||
| Interest rate | 1.75% | 1.75% |
| Debt instrument, conversion price (in dollars per share) | $ 16.42 | $ 16.42 |
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- Definition The price per share of the conversion feature embedded in the debt instrument. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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