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Description of the Business - Additional Information (Detail)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended
Oct. 14, 2015
USD ($)
$ / shares
shares
Oct. 02, 2015
Oct. 31, 2015
USD ($)
Jun. 30, 2016
Business Acquisition Equity Interests Issued Or Issuable [Line Items]        
Net proceeds from IPO after underwriting discounts, commissions and estimated offering expenses | $     $ 81.8  
Reverse stock split       one-for-62.997
Reverse stock split conversion ratio   0.01587    
Initial Public Offering | Common Stock        
Business Acquisition Equity Interests Issued Or Issuable [Line Items]        
IPO price per share | $ / shares $ 12.00      
Common stock shares issued | shares 7,666,667      
Net proceeds from IPO after underwriting discounts, commissions and estimated offering expenses | $ $ 81.8      
Underwriters | Common Stock        
Business Acquisition Equity Interests Issued Or Issuable [Line Items]        
Common stock shares issued | shares 1,000,000