Significant Accounting Policies - Net Loss Per Share, Basic and Diluted (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
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| Accounting Policies [Abstract] | ||||
| Difference between basic net loss per share and diluted net loss per share (usd per share) | $ 0 | $ 0 | $ 0 | $ 0 |
| X | ||||||||||
- Definition The amount of difference between basic net income (loss) per share and diluted net income (loss) per share due to the impact of anti-dilutive items during the period. No definition available.
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| X | ||||||||||
- References No definition available.
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