Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 169,658	$ 166,308
Short term investments	20,061	17,811
Accounts receivable, net of allowance of $85 at September 29, 2012 and $88 at December 31, 2011	53,379	43,338
Unbilled revenue	1,693	2,362
Inventory	32,592	31,089
Deferred tax assets	14,882	15,344
Other current assets	4,608	7,928
Total current assets	296,873	284,180
Property and equipment, net	24,838	29,029
Deferred tax assets	10,424	6,127
Other assets	18,599	12,877
Total assets	350,734	332,213
Current liabilities:
Accounts payable	38,317	48,406
Accrued expenses	18,713	17,188
Accrued compensation	9,037	17,879
Deferred revenue and customer advances	2,118	1,527
Total current liabilities	68,185	85,000
Long term liabilities	3,940	4,255
Commitments and contingencies (Note 6)
Redeemable convertible preferred stock, 5,000,000 shares authorized and none outstanding
Common stock, $0.01 par value, 100,000,000 shares authorized; 27,725,543 and 27,216,555 shares issued and outstanding at September 29, 2012 and December 31, 2011, respectively	277	272
Additional paid-in capital	196,702	184,395
Retained earnings	81,375	58,140
Accumulated other comprehensive income	255	151
Total stockholders' equity	278,609	242,958
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 350,734	$ 332,213