Stockholders' Equity (Deficit) - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2018	Dec. 31, 2019	Dec. 31, 2018
Subsidiary Sale Of Stock [Line Items]
Proceeds from issuance of common stock		$ 37	$ 78,806
Preferred stock, shares outstanding		0	0
Private Placement [Member]
Subsidiary Sale Of Stock [Line Items]
Common stock issued (in shares)		316,080
Proceeds from issuance of common stock		$ 7,900
IPO [Member]
Subsidiary Sale Of Stock [Line Items]
Common stock issued (in shares)	4,485,000
Proceeds from issuance of common stock	$ 67,300