Subsequent events (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Apr. 10, 2017 |
Mar. 31, 2017 |
|
| Proceeds from issuance of common stock | $ 61,397,000 | |
| Common stock | ||
| Stock issuance costs | $ 4,544,000 | |
| Subsequent events | Matrix Capital Management Company, LP | ||
| Issuance of shares represented by American Depositary Shares (in ADSs) | 7,000,000 | |
| Share price per ADS (in dollars per share) | $ 6.00 | |
| Subsequent events | Common stock | Matrix Capital Management Company, LP | ||
| Issuance of stock (in shares) | 42,000,000 | |
| Proceeds from issuance of common stock | $ 41,765,000 | |
| Stock issuance costs | $ 235,000 |
| X | ||||||||||
- Definition Number of American Depositary Shares representing shares issued during the period. No definition available.
|
| X | ||||||||||
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
|
| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|