Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Proceeds from offering, net of underwriting discounts and commissions and offering expenses		$ 271,224	$ 181,863	$ 133,862
Preferred stock, shares authorized		5,000,000	5,000,000
Preferred stock, par value		$ 0.0001	$ 0.0001
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Follow-On-Offering
Class Of Stock [Line Items]
Common stock shares issued	5,663,750
Common stock shares issued, price per share	$ 51.00
Stock repurchase offering period	30 days
Proceeds from offering, net of underwriting discounts and commissions and offering expenses		$ 271,200
Over Allotment Option
Class Of Stock [Line Items]
Common stock shares issued	738,750