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