Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands		Apr. 30, 2020	Oct. 31, 2019
Receivables [Abstract]
Amount billed		$ 5,632	$ 2,227
Unbilled receivables	[1]	5,820	6,139
Commercial customers accounts receivable		11,452	8,366
Advanced Technologies including U.S. government, Amount billed		485	1,065
Advanced Technologies including U.S. government, Unbilled receivables		1,655	1,545
Advanced Technologies including U.S. government, Accounts receivable	[2]	2,140	2,610
Accounts receivable, net and unbilled receivables		$ 13,592	$ 10,976

[1] Additional long-term unbilled receivables of $4.4 million and $3.6 million are included within “Other Assets” as of April 30, 2020 and October 31, 2019, respectively.

[2] Total U.S. government accounts receivable, including unbilled receivables, outstanding as of April 30, 2020 and October 31, 2019 were $1.4 million and $1.2 million, respectively.