Stock-Based Compensation - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	2 Months Ended	12 Months Ended
	Dec. 31, 2018	Oct. 31, 2018	Oct. 31, 2017
Employee Stock Option [Member]
Number of Shares, Outstanding at beginning of period	5,784,505	3,525,530	383,210
Number of Shares, Granted	396,861	2,638,769	3,482,000
Number of Shares, Exercised		(161,810)	(268,847)
Number of Shares, Forfeited	(938)	(217,984)	(70,833)
Number of Shares, Outstanding at end of period	6,180,428	5,784,505	3,525,530
Number of Shares, Options exercisable	3,899,806
Weighted Average Exercise Price, Outstanding at beginning of year	$ 13.68	$ 6.34	$ 5.74
Weighted Average Exercise Price, Granted	14.27	23.55	6.29
Weighted Average Exercise Price, Exercised		4.31	4.84
Weighted Average Exercise Price, Forfeited	24.20	21.89	6.42
Weighted Average Exercise Price, Outstanding at end of year	13.72	13.68	$ 6.34
Weighted Average Exercise Price, Options exercisable	9.23	$ 8.53
Weighted-average fair value of options granted during the period	$ 9.95
Non-Employee Stock Option [Member]
Number of Shares, Outstanding at beginning of period	296,000	293,000
Number of Shares, Granted	23,791	3,000	293,000
Number of Shares, Forfeited	(334)
Number of Shares, Outstanding at end of period	319,457	296,000	293,000
Number of Shares, Options exercisable	199,207
Weighted Average Exercise Price, Outstanding at beginning of year	$ 19.60	$ 19.61
Weighted Average Exercise Price, Granted	21.42	18.63	19.61
Weighted Average Exercise Price, Forfeited	6.33
Weighted Average Exercise Price, Outstanding at end of year	19.75	$ 19.60	$ 19.61
Weighted Average Exercise Price, Options exercisable	$ 17.90