Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011
Cash flows from operating activities:
Net loss	$ (10,499)	$ (13,776)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,760	7,099
Stock-based compensation	1,128	1,875
Other non-cash items	34	(124)
Changes in assets and liabilities:
Accounts receivable	14,029	9,407
Advance billings	(4,247)	(407)
Inventories	(4,345)	(3,287)
Prepaid expenses and other current assets	3,476	(310)
Other assets	183	247
Accounts payable	(6,065)	(4,536)
Accrued liabilities	(4,137)	4,540
Deferred revenue	(6,501)	(239)
Income taxes payable, non-current and other liabilities	(1,507)	(565)
Net cash provided by (used in) operating activities	(7,197)	738
Cash flows from investing activities:
Maturities of available-for-sale investments	0	2,151
Decrease in restricted cash	0	1,996
Purchases of property and equipment	(1,249)	(785)
Proceeds from Sale of Property, Plant, and Equipment	0	842
Net cash provided by (used in) investing activities	(1,249)	4,204
Cash flows from financing activities:
Proceeds from stock plans, net	267	12,744
Net cash provided by financing activities	267	12,744
Effect of exchange rate changes on cash and cash equivalents	223	1,489
Net increase (decrease) in cash and cash equivalents	(7,956)	19,175
Cash and cash equivalents, beginning of period	31,073	16,863
Cash and cash equivalents, end of period	$ 23,117	$ 36,038