Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013		Sep. 29, 2012
Cash flows from operating activities:
Net loss	$ (26,968)		$ (7,082)
Adjustments to reconcile net loss to net cash provided by operating activities:
Gain on sale of facility			(677)
Depreciation and amortization	10,077		7,088
Share-based compensation expense	3,962		3,254
Deferred income taxes	(1,090)		(262)
Other accrued liabilities	431		158
Changes in current assets and liabilities, excluding effects from acquisitions:
Accounts receivable	88		(1,656)
Inventories	11,702		13,468
Other current assets	1,589		1,455
Accounts payable	(605)		(245)
Deferred profit	3,249		(1,019)
Income taxes payable, including excess stock option exercise benefit	406		(33)
Accrued compensation, warranty and other liabilities	(963)		(3,662)
Net cash provided by operating activities	1,878		10,787
Cash flows from investing activities, excluding effects from acquisitions:
Payment for purchase of Ismeca, net of cash received	(53,463)
Purchases of short-term investments			(40,461)
Sales and maturities of short-term investments	812		57,720
Purchases of property, plant and equipment	(2,513)		(2,416)
Cash received from facility sale			1,080
Cash paid for Duma Video, Inc.			(900)
Other assets	(151)		(44)
Net cash provided by (used in) investing activities	(55,315)		14,979
Cash flows from financing activities:
Cash dividends	(2,972)		(4,388)
Issuance of stock, net of repurchases	900		1,048
Net cash used in financing activities	(2,072)		(3,340)
Effect of exchange rate changes on cash and cash equivalents	(1,051)		(58)
Net increase (decrease) in cash and cash equivalents	(56,560)		22,368
Cash and cash equivalents at beginning of period	102,808	[1]	53,262
Cash and cash equivalents at end of period	46,248		75,630
Supplemental disclosure of cash flow information:
Cash (refunded) paid for income taxes	(1,135)		833
Inventory capitalized as property, plant and equipment	572		567
Dividends declared but not yet paid	$ 1,496		$ 1,468

[1] Derived from December 29, 2012 audited financial statements