Subsequent Events (Details) - Subsequent Event - Public offering $ / shares in Units, $ in Millions	Feb. 12, 2018 USD ($) $ / shares shares
Subsequent Events
Issuance of shares (in shares) | shares	3,373,332
Price per share (in dollars per share) | $ / shares	$ 7.50
Proceeds from issuance of stock (in dollars) | $	$ 23.3