v3.6.0.2

Income taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Deferred tax assets: |  |  |  |
Net operating loss carryforwards | $ 23,669 | $ 16,895 |  |
Outside basis differences for U.S. partnerships | 16,121 | 6,190 |  |
Stock options | 5,307 | 3,882 |  |
Deferred revenue | 526 | 376 |  |
Deferred compensation | 199 | 301 |  |
State taxes | 49 | 67 |  |
Other | 1,622 | 1,312 |  |
Valuation allowance | (36,331) | (19,548) | $ (12,470) | $ (4,101)
Net deferred tax assets | 11,162 | 9,475 |  |
Deferred tax liabilities: |  |  |  |
Intangible assets | (5,658) | (6,268) |  |
Property and equipment | (8,712) | (6,172) |  |
Net deferred tax liabilities | (14,370) | (12,440) |  |
Net deferred taxes | $ (3,208) | $ (2,965) |  |

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