Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Oct. 01, 2011	Jan. 01, 2011
Current assets:
Cash and cash equivalents	$ 131,662	$ 108,383
Short term investments	13,662	13,928
Accounts receivable, net of allowance of $88 at October 1, 2011 and January 1, 2011	41,400	34,056
Unbilled revenue	7,899	4,012
Inventory	31,989	27,160
Deferred tax assets	14,013	12,917
Other current assets	12,655	6,137
Total current assets	253,280	206,593
Property and equipment, net	28,886	25,620
Deferred tax assets	6,307	8,338
Other assets	13,453	13,780
Total assets	301,926	254,331
Current liabilities:
Accounts payable	40,522	38,689
Accrued expenses	15,237	15,790
Accrued compensation	15,045	17,827
Deferred revenue and customer advances	2,358	3,534
Total current liabilities	73,162	75,840
Long term liabilities	3,727	3,584
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; 26,927,670 and 25,844,840 shares issued and outstanding at October 1, 2011 and January 1, 2011, respectively	269	258
Additional paid-in capital	177,188	156,620
Retained earnings	47,502	17,949
Accumulated other comprehensive income	78	80
Total stockholders' equity	225,037	174,907
Total liabilities, redeemable convertible preferred stock and stockholders' equity	$ 301,926	$ 254,331