BALANCE SHEET COMPONENTS (Components of significant balance sheet accounts) (Details) - USD ($)		Oct. 01, 2016	Oct. 03, 2015
Inventories, net:
Raw materials and supplies		$ 16,376,000	$ 23,541,000
Work in process		22,733,000	24,110,000
Finished goods		69,266,000	50,518,000
Inventory, gross		108,375,000	98,169,000
Inventory reserves		(21,080,000)	(19,073,000)
Inventories, net		87,295,000	79,096,000
Property, plant and equipment, net:
Buildings and building improvements		34,472,000	33,760,000
Leasehold improvements		19,963,000	19,512,000
Data processing equipment and software		29,476,000	28,861,000
Machinery, equipment, furniture and fixtures		54,730,000	52,106,000
Property, plant and equipment, gross		138,641,000	134,239,000
Accumulated depreciation		(88,299,000)	(81,005,000)
Property, plant and equipment, net		50,342,000	53,234,000
Accrued expenses and other current liabilities:
Wages and benefits		24,248,000	19,166,000
Accrued customer obligations (1)	[1]	13,077,000	9,215,000
Commissions and professional fees		10,908,000	3,880,000
Deferred rent		2,920,000	2,450,000
Severance (2)	[2]	1,296,000	1,645,000
Other		11,505,000	9,615,000
Accrued expenses and other current liabilities		63,954,000	45,971,000
Employee Severance [Member]
Accrued expenses and other current liabilities:
Severance (2)		$ 800,000	$ 0

[1] Represents customer advance payments, customer credit program, accrued warranty expense and accrued retrofit obligations.

[2] Includes the restructuring plan discussed in Note 3, severance payable in connection with the October 2015 retirement of the Company's CEO of $0.8 million (As of Oct 3, 2015: nil), and other severance payments which are not part of the Company's plan to streamline its global operations and functions.