Stockholders' Equity - Summary of the Stock Repurchase Program (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 31, 2018 USD ($) $ / shares shares
Shares Repurchased
Cumulative balance at October 31, 2017 (in shares) | shares	0
Repurchase of common stock under the stock repurchase program (in shares) | shares	262,487
Cumulative balance at January 31, 2018 (in shares) | shares	262,487
Weighted-Average Price per Share
Cumulative balance at October 31, 2017 (in USD per share) | $ / shares	$ 0.00
Repurchase of common stock under the stock repurchase program (in USD per share) | $ / shares	21.92
Cumulative balance at January 31, 2018 (in USD per share) | $ / shares	$ 21.92
Amount Repurchased (in thousands)
Cumulative balance at October 31, 2017 | $	$ 0
Repurchase of common stock under the stock repurchase program | $	5,755
Cumulative balance at January 31, 2018 | $	$ 5,755