INCOME TAXES (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Foreign Tax [Abstract]
U.S. statutory rate	21.00%	21.00%	23.42%	35.00%
Components of income before income tax provision [Abstract]
United States	$ (10,672)	$ (8,379)	$ (9,859)
Foreign	72,273	59,080	78,430
Income before income tax provision	61,601	50,701	68,571
Current [Abstract]
Federal	0	(3,916)	(30)
State	4	11	0
Foreign	21,698	17,777	11,584
Deferred [Abstract]
Federal	0	3,673	(3,673)
State	8	10	(24)
Foreign	(452)	(7,345)	(522)
Income Tax Expense, Total	21,258	10,210	7,335
Income tax provision reconciliation [Abstract]
U.S. federal income tax at statutory rate	12,936	10,647	16,059
Changes in valuation allowances	6,942	2,673	4,554
Foreign tax rate differentials	1,718	218	(2,078)
Tax credits	(1,562)	(1,268)	(1,530)
Uncertain tax positions, including reserves, settlements and resolutions	1,637	134	(1,791)
Employee stock option	0	0	(1,433)
Income tax holiday	(318)	(2,234)	(2,648)
Tax reform	0	0	(3,736)
Distributions from foreign subsidiaries	0	0	0
Tax on foreign subsidiary earnings	0	0	0
Other, net	(95)	40	(62)
Income Tax Expense, Total	$ 21,258	$ 10,210	$ 7,335
Effective tax rate	34.50%	20.10%	10.70%
Income Tax Holiday [Abstract]
Term of tax year holidays	5 years
Dollar effect of income tax holiday	$ 100	$ 2,200	$ 2,600
Per share effect of income tax holiday (in dollars per share)	$ 0.02	$ 0.035
Deferred income tax assets [Abstract]
Net operating losses	$ 34,457	$ 32,229
Reserves not currently deductible	6,287	5,013
Tax credit carryforwards	9,481	9,164
Share-based compensation	1,306	860
Property, plant and equipment	3,887	0
Other	398	434
Deferred tax assets	55,816	47,700
Valuation allowances	(33,973)	(27,032)
Deferred tax assets net of valuation allowance	21,843	20,668
Deferred income tax liabilities [Abstract]
Property, plant and equipment	0	(251)
Other	0	0
Deferred income taxes liabilities	0	(251)
Net deferred income tax assets	21,843	20,417
Reported as [Abstract]
Deferred income tax assets	22,070	20,779
Deferred income tax liabilities	(227)	(362)
Net deferred income tax assets	$ 21,843	20,417
Taiwan Agency of the Ministry of Finance [Member]
Foreign Tax [Abstract]
Foreign statutory rate	20.00%		17.00%
Foreign income tax expense (benefit)		$ (200)
Federal Alternate Minimum [Member]
Foreign Tax [Abstract]
Change in valuation allowance	$ 3,900
Foreign [Member] | Maximum [Member]
Income Tax Holiday [Abstract]
Income tax holiday termination date	December 31, 2019