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Organization and Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Mar. 31, 2016
Dec. 31, 2015
Conversion of convertible preferred stock into common stock (in shares) 9,029,549        
Accumulated deficit       $ (117,428) $ (108,010)
Proceeds from issuance of preferred stock     $ 12,331    
Initial public offering          
Share price (in dollars per share) $ 12.00 $ 12.00      
Proceeds from Issuance Initial Public Offering   $ 61,700      
Underwriting discounts, commissions and offering-related expenses payable   $ 7,300      
Conversion of convertible preferred stock into common stock (in shares)   9,029,549      
Stock Issued During Period, Shares, New Issues   5,750,000      
Initial public offering | Warrants for purchase of Common Stock          
Number of shares after conversion of issued warrants (in shares) 24,566 24,566      
Over-Allotment option for underwriters          
Stock Issued During Period, Shares, New Issues   750,000      
Preferred Stock | Initial public offering          
Preferred Stock warrants converted (in shares)   315,688