Basis of Presentation and Significant Accounting Policies - Infrastructure Advances (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Aug. 31, 2018	Jul. 31, 2018	Oct. 31, 2017
Significant Accounting Policies [Line Items]
Infrastructure advance, noncurrent	$ 1,800	$ 2,600
Agricola Belher [Member]
Significant Accounting Policies [Line Items]
Infrastructure advance	2,600	3,400	$ 3,000		$ 600
Annual repayment of advances			$ 600
Infrastructure advance, current	800	800
Infrastructure advance, noncurrent	$ 1,800	$ 2,600
Agricola Belher [Member] | LIBOR
Significant Accounting Policies [Line Items]
Advances variable interest rate (as a percent)			10.00%	3.00%