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v3.3.1.900

Nature of Business (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
May. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Class of Stock [Line Items] |  |  |  |
Proceeds from initial public offering, net of issuance costs |  | $ 136,251 | $ 0 | $ 0
Class A Subordinate Voting | IPO |  |  |  |
Class of Stock [Line Items] |  |  |  |
Share price (in dollars per share) | $ 17.00 |  |  |
Proceeds from initial public offering, net of issuance costs | $ 136,251 |  |  |
Underwriting discounts and commissions | 10,537 |  |  |
Other offering expenses | $ 3,747 |  |  |
Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Issuance of stock (in shares) |  | 8,855,000 |  |
Shares issued upon conversion of convertible preferred stock |  | 27,159,277 |  |
Common Stock | Class A Subordinate Voting | IPO |  |  |  |
Class of Stock [Line Items] |  |  |  |
Issuance of stock (in shares) | 8,855,000 |  |  |
Common Stock | Class A Subordinate Voting | Over-Allotment Option |  |  |  |
Class of Stock [Line Items] |  |  |  |
Issuance of stock (in shares) | 1,155,000 |  |  |
Common Stock | Class B Multiple Voting | IPO |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares issued upon redesignation of common stock | 39,780,952 |  |  |
Shares issued upon conversion of convertible preferred stock | 27,159,277 |  |  |

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