Accounts Receivable, Net - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands		Apr. 30, 2018	Oct. 31, 2017
Receivables [Abstract]
Contract receivable		$ 15,621	$ 41,073
Unbilled contracts receivable	[1]	22,746	18,162
Commercial customers accounts receivable		38,367	59,235
Advanced Technologies including U.S. government, Amount billed receivable		1,980	1,934
Advanced Technologies including U.S. government, Unbilled recoverable costs receivable		5,842	7,352
Advanced Technologies including U.S. government, Accounts receivable	[2]	7,822	9,286
Accounts receivable, net		$ 46,189	$ 68,521

[1] Additional long-term unbilled recoverable costs of $11.2 million and $12.8 million are included within “Other assets” as of April 30, 2018 and October 31, 2017, respectively.

[2] Total U.S. government accounts receivable, including unbilled recoverable cost, outstanding as of April 30, 2018 and October 31, 2017 were $4.5 million and $3.2 million, respectively.