Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended
	Jul. 23, 2018	Jul. 18, 2018	Jul. 31, 2018
Subsequent Event [Line Items]
Proceeds from issuance of common stock net of underwriting discounts and offering costs	$ 92,026
Offering expenses	$ 6,300
Common Stock [Member]
Subsequent Event [Line Items]
Common stock, shares issued		5,175,000
Sale of common stock, per share		$ 19.00
Underwriter's Over-Allotment [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Common stock, shares issued	675,000	675,000	675,000