Redeemable Convertible Preferred Shares - Summary of Redeemable Convertible Preferred Shares (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Temporary Equity [Line Items] |
|
|
|
| Repurchase of preferred shares |
$ (1,287)
|
$ (59,082)
|
|
| Initial Public Offering [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Converted to common shares upon IPO |
|
470,759
|
|
| Series E Tranche 1 Preferred Shares [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| BCF upon Series E |
$ 52,377
|
|
|
| Series D Preferred Stock [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Accretion of Series D to convertible redeemable preferred shares redemption value |
|
1,870
|
$ 4,300
|
| Accretion of Series E to convertible redeemable preferred shares redemption value |
|
$ (1,870)
|
(4,300)
|
| Convertible Redeemable Preferred Shares [Member] | Series E Tranche 1 Preferred Shares [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Beginning balance |
|
|
|
| Addition |
$ 275,314
|
|
|
| Exercise of Series E subsequent sale rights |
28,568
|
|
|
| BCF upon Series E |
(53,486)
|
|
|
| Amortisation of BCF of Series E |
4,139
|
|
|
| Accretion of Series E to convertible redeemable preferred shares redemption value |
12,754
|
|
|
| Acceleration of amortization of BCF of Series E upon IPO |
49,346
|
|
|
| Converted to common shares upon IPO |
$ (344,031)
|
|
|
| Ending balance |
|
|
|
| Convertible Redeemable Preferred Shares [Member] | Series E Tranche 1 Preferred Shares [Member] | Initial Public Offering [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Deemed dividend to preferred shareholders upon IPO |
$ 27,396
|
|
|
| Convertible Redeemable Preferred Shares [Member] | Series D Preferred Stock [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Beginning balance |
|
$ 40,290
|
$ 35,990
|
| Deemed dividend to preferred shareholders upon IPO |
|
279
|
|
| Accretion of Series D to convertible redeemable preferred shares redemption value |
|
1,870
|
$ 4,300
|
| Repurchase of preferred shares |
|
$ (15,003)
|
|
| Ending balance |
|
|
$ 40,290
|
| Convertible Redeemable Preferred Shares [Member] | Series D Preferred Stock [Member] | Initial Public Offering [Member] |
|
|
|
| Temporary Equity [Line Items] |
|
|
|
| Deemed dividend to preferred shareholders upon IPO |
|
$ 4,008
|
|
| Converted to common shares upon IPO |
|
$ (31,444)
|
|