Accounts Receivable, Net - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands		Jul. 31, 2018	Oct. 31, 2017
Receivables [Abstract]
Contract receivable		$ 24,196	$ 41,073
Unbilled contracts receivables	[1]	9,512	18,162
Commercial customers accounts receivable		33,708	59,235
Advanced Technologies including U.S. government, Amount billed receivable		1,208	1,934
Advanced Technologies including U.S. government, Unbilled receivables		4,514	7,352
Advanced Technologies including U.S. government, Accounts receivable	[2]	5,722	9,286
Accounts receivable, net		$ 39,430	$ 68,521

[1] Additional long-term unbilled receivables of $8.9 million and $12.8 million are included within “Other Assets” as of July 31, 2018 and October 31, 2017, respectively.

[2] Total U.S. government accounts receivable, including unbilled receivables, outstanding as of July 31, 2018 and October 31, 2017 were $2.6 million and $3.2 million, respectively.