Subsequent Events - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Subsequent Event [Line Items]
Common stock, par value		$ 0.001	$ 0.001
Exercise of stock options, shares		1,321	163,968
Subsequent Event | Follow-On Public Offering [Member]
Subsequent Event [Line Items]
Issuance of common stock in initial public offering, net of issuance costs, shares	553,825
Common stock, par value	$ 19.85
Proceeds from issuance of common stock	$ 9,900,000
Subsequent Event | Underwriter Purchase Option {Member]
Subsequent Event [Line Items]
Issuance of common stock in initial public offering, net of issuance costs, shares	26,825
Subsequent Event | Selling Stockholders [Member]
Subsequent Event [Line Items]
Issuance of common stock in initial public offering, net of issuance costs, shares	3,162,164
Exercise of stock options, shares	73,000
Proceeds from issuance of common stock	$ 0