Stockholders' Equity (Details) - USD ($)	May 02, 2017	Jan. 19, 2017	Apr. 26, 2017
Class of Stock [Line Items]
Securities authorized (up to)		$ 100,000,000
Number of shares sold by selling stockholders (in shares)	9,200,000
Common stock
Class of Stock [Line Items]
Selling stockholders may sell shares of stock (up to)		20,000,000
Common stock, shares authorized (up to) (in shares)			1,150,000
Price per share to sell common stock (in dollars per share)			$ 16.50
Number of shares sold in offering	1,150,000
Net proceeds from offering	$ 17,400,000
Underwriter commission and offering costs	$ 1,600,000