Capital Stock - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | 12 Months Ended | |
|---|---|---|---|
Feb. 28, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Series X and Series Y Convertible Preferred Stock | |||
| Sale of stock | |||
| Number of shares issued for each share of convertible preferred stock that is converted | 1,000 | ||
| Series X Convertible Preferred Stock | |||
| Sale of stock | |||
| Issuance of stock, net (in shares) | 5,003 | ||
| Preferred stock conversion price per share | $ 4.03 | ||
| Fair value of common stock amount exceeded purchase price of convertible preferred stock | $ 5.6 | ||
| Series Y Preferred Stock | |||
| Sale of stock | |||
| Issuance of stock, net (in shares) | 1,252.772 | ||
| Preferred stock conversion price per share | $ 13.00 | ||
| X | ||||||||||
- Definition Number of shares issued for each share of convertible preferred stock that is converted. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Fair value of common stock amount exceeded allocated purchase price of convertible preferred stock. No definition available.
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| X | ||||||||||
- Definition Preferred stock conversion price per share. No definition available.
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| X | ||||||||||
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