Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands		Oct. 31, 2020	Oct. 31, 2019
Receivables [Abstract]
Amount billed		$ 7,329	$ 2,227
Unbilled receivables	[1]	7,063	6,139
Commercial customers accounts receivable		14,392	8,366
Advanced Technologies including U.S. government, Amount billed		2,234	1,065
Advanced Technologies including U.S. government, Unbilled receivables		978	1,545
Advanced Technologies including U.S. government, Accounts receivable	[2]	3,212	2,610
Accounts receivable, net and unbilled receivables		$ 17,604	$ 10,976

[1] Additional long-term unbilled receivables of $8.9 million and $3.6 million are included within “Other Assets” as of October 31, 2020 and 2019, respectively.

[2] Total U.S. government accounts receivable, including unbilled receivables, outstanding as of October 31, 2020 and 2019 were $1.1 million and $1.2 million, respectively.