v3.10.0.1

Summary of significant accounting policies - Adoption of ASC 606 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Adoption of ASC 606 |  |  |  |  |  |
Accumulated deficit | $ (129,824) |  | $ (129,824) |  |  | $ (131,967)
Accounts receivable, net | 37,444 |  | 37,444 |  | $ 25,079 | 26,148
Prepaid expenses and other current assets | 7,200 |  | 7,200 |  | 6,539 | 6,369
Other assets | 7,771 |  | 7,771 |  | 7,903 | 10,082
Deferred revenue, current | 67,446 |  | 67,446 |  | 75,884 | 61,708
Deferred revenue, net of current portion | 135,450 |  | 135,450 |  | 128,588 | 149,168
Non-controlling interests | 1,572 |  | 1,572 |  |  | 1,212
Revenue | 59,601 | $ 49,033 | 117,760 | $ 93,366 |  |
Income tax expense | 16 | 141 | 144 | 340 |  |
Non-controlling interests | 395 | $ 160 | 851 | $ 267 |  |
Adjustment for adoption |  |  |  |  |  |
Adoption of ASC 606 |  |  |  |  |  |
Accounts receivable, net |  |  |  |  | (1,069) |
Prepaid expenses and other current assets |  |  |  |  | 170 |
Other assets |  |  |  |  | (2,179) |
Deferred revenue, current |  |  |  |  | 14,176 |
Deferred revenue, net of current portion |  |  |  |  | (20,580) |
ASC 606 | As per ASC 605 |  |  |  |  |  |
Adoption of ASC 606 |  |  |  |  |  |
Accounts receivable, net | 37,955 |  | 37,955 |  |  | 26,148
Prepaid expenses and other current assets | 7,177 |  | 7,177 |  |  | 6,369
Other assets | 9,948 |  | 9,948 |  |  | 10,082
Deferred revenue, current | 67,128 |  | 67,128 |  |  | 61,708
Deferred revenue, net of current portion | 147,468 |  | 147,468 |  |  | $ 149,168
Non-controlling interests | (54) |  | (54) |  |  |
Revenue | 58,394 |  | 112,284 |  |  |
Income tax expense | 129 |  | 380 |  |  |
Non-controlling interests | 132 |  | (707) |  |  |
ASC 606 | Adjustment for adoption |  |  |  |  |  |
Adoption of ASC 606 |  |  |  |  |  |
Accumulated deficit |  |  |  |  | 3,257 |
Accounts receivable, net | (511) |  | (511) |  |  |
Prepaid expenses and other current assets | 23 |  | 23 |  |  |
Other assets | (2,177) |  | (2,177) |  |  |
Deferred revenue, current | 318 |  | 318 |  |  |
Deferred revenue, net of current portion | (12,018) |  | (12,018) |  |  |
Non-controlling interests | 1,626 |  | 1,626 |  | $ 69 |
Revenue | 1,207 |  | 5,476 |  |  |
Income tax expense | (113) |  | (236) |  |  |
Non-controlling interests | $ 263 |  | $ 1,558 |  |  |

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