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Stockholders' Equity - Additional Information (Detail) - Common Stock [Member] - USD ($)
$ / shares in Units, $ in Thousands
Apr. 05, 2017
Mar. 31, 2017
Mar. 30, 2017
Maximum [Member]      
Subsidiary, Sale of Stock [Line Items]      
Common stock, shares subscribed     5,117,500
Underwriter's Over-Allotment [Member] | Maximum [Member]      
Subsidiary, Sale of Stock [Line Items]      
Common stock, shares subscribed     667,500
Common stock, shares issued 667,500    
Follow-on Public Offering [Member]      
Subsidiary, Sale of Stock [Line Items]      
Public offering price per share   $ 18.00 $ 18.00
Proceeds from issuance of common stock net of underwriting discounts and offering costs $ 86,224    
Offering expenses paid $ 5,891