Subsequent Events - Textual (Details) - Subsequent Event [Member] $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 30, 2018 USD ($) $ / shares shares
Subsequent Event [Line Items]
Public offering price (usd per share) | $ / shares	$ 9.25
Proceeds from issuance of common stock, net of costs | $	$ 37.2
Underwritten Public Offering [Member]
Subsequent Event [Line Items]
Issuance of common stock, net of issuance costs (shares)	4,312,500
Over-Allotment Option [Member]
Subsequent Event [Line Items]
Issuance of common stock, net of issuance costs (shares)	562,500