REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2020	Aug. 02, 2020	May 03, 2020	Feb. 02, 2020	Oct. 31, 2019	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Disaggregation of Revenue [Abstract]
Revenue	$ 149,286	$ 157,895	$ 142,774	$ 159,736	$ 156,256	$ 138,112	$ 131,580	$ 124,712	$ 609,691	$ 550,660	$ 535,276
Over Time [Member]
Disaggregation of Revenue [Abstract]
Revenue									535,071	497,942
At a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Revenue									74,620	52,718
Taiwan [Member]
Disaggregation of Revenue [Abstract]
Revenue									239,101	244,377	237,039
Korea [Member]
Disaggregation of Revenue [Abstract]
Revenue									153,052	147,734	147,066
United States [Member]
Disaggregation of Revenue [Abstract]
Revenue									104,949	105,045	112,648
China [Member]
Disaggregation of Revenue [Abstract]
Revenue									79,374	19,010	1,157
Europe [Member]
Disaggregation of Revenue [Abstract]
Revenue									31,501	32,585	35,540
All Other Asia [Member]
Disaggregation of Revenue [Abstract]
Revenue									1,714	1,909	1,826
IC [Member]
Disaggregation of Revenue [Abstract]
Revenue									418,410	406,191	416,064
High-end [Member]
Disaggregation of Revenue [Abstract]
Revenue									156,129	156,418
Mainstream [Member]
Disaggregation of Revenue [Abstract]
Revenue									262,281	249,773
FPD [Member]
Disaggregation of Revenue [Abstract]
Revenue									191,281	144,469	$ 119,212
High-end [Member]
Disaggregation of Revenue [Abstract]
Revenue									139,558	98,832
Mainstream [Member]
Disaggregation of Revenue [Abstract]
Revenue									$ 51,723	$ 45,637