v3.6.0.2

Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Taxes |  |  |
Valuation allowance increase | $ 34,500 | $ 24,500 | $ 900
Deferred tax assets |  |  |
Net operating loss carryforwards | 68,504 | 41,451 |
Research and development tax credit carryforwards | 8,634 | 4,794 |
Reserves and accruals | 5,719 | 3,108 |
Stock based compensation | 3,220 | 2,206 |
Total deferred tax assets before valuation allowance | 86,077 | 51,559 |
Less: valuation allowance | (85,606) | (51,153) |
Deferred tax assets, net | 471 | 406 |
Deferred tax liabilities |  |  |
Property and equipment | $ (471) | $ (406) |

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