JOINT VENTURE, TECHNOLOGY LICENSE AND OTHER AGREEMENTS WITH MICRON TECHNOLOGY, INC. (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended										12 Months Ended
	May 31, 2016	Oct. 31, 2018	Jul. 29, 2018	Apr. 29, 2018	[1]	Jan. 28, 2018	Oct. 29, 2017	Jul. 30, 2017	Apr. 30, 2017	[1]	Jan. 29, 2017	Oct. 31, 2018		Oct. 29, 2017		Oct. 30, 2016
Variable Interest Entity [Abstract]
Operating loss												$ (700)
Commission revenue earned under supply agreement		$ 144,660	$ 136,391	$ 130,779		$ 123,446	$ 120,971	$ 111,579	$ 108,297		$ 109,831	535,276	[1]	$ 450,678	[1]	$ 483,456
Amortization of supply agreement												4,800		4,900		4,800
Cost of goods sold												403,773		359,363		364,750
Research and development expenses												$ 14,481		$ 15,862		21,654
Summarized financial information of MP Mask [Abstract]
Revenue																49,626
Gross profit																2,736
Net income																0
MP Mask [Member]
Variable Interest Entity [Abstract]
Proceeds from sale of equity method investment	$ 93,100
Gain on sale of equity method investment	$ 100
Additional investment in joint venture																0
Distributions from joint venture																0
Operating loss																(100)
Commission revenue earned under supply agreement																400
Amortization of supply agreement																100
Cost of goods sold																5,700
Research and development expenses																$ 500
Co-venturer [Member]
Variable Interest Entity [Abstract]
Supply agreement term subject to mutually agreeable renewals	1 year

[1] Includes $0.6 million gain on sale of assets.