Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 104,598	$ 93,233
Short-term investments	64,991	64,990
Accounts receivable, net	53,721	62,559
Inventories, net	50,024	48,894
Deferred income taxes, net	6,025	7,216
Prepaid expenses and other current assets	13,106	11,186
Total current assets	292,465	288,078
Property and Equipment:
Machinery and equipment	32,196	32,236
Furniture and fixtures	6,366	6,516
Leasehold improvements	10,812	10,897
Property and equipment at cost	49,374	49,649
Less: accumulated depreciation and amortization	(34,913)	(34,305)
Property and equipment, net	14,461	15,344
Goodwill	18,485	18,816
Intangible assets, net	7,186	7,048
Service inventory	18,316	19,125
Deferred income taxes, net	2,345	2,396
Total Assets	353,258	350,807
Current Liabilities:
Accounts payable	9,460	10,413
Accrued liabilities	18,260	18,216
Income taxes payable	2,379	4,886
Current portion of unearned service revenues	19,235	19,460
Customer deposits	2,692	2,662
Current portion of obligations under capital leases	28	45
Total current liabilities	52,054	55,682
Unearned service revenues - less current portion	11,312	11,221
Deferred tax liability, net	1,118	1,149
Obligations under capital leases - less current portion	17	19
Total Liabilities	64,501	68,071
Commitments and contingencies - See Note Q
Shareholders' Equity:
Common stock - par value $.001, 50,000,000 shares authorized; 17,771,559 and 17,653,879 issued; 17,091,324 and 16,973,644 outstanding, respectively	18	18
Additional paid-in-capital	185,969	181,094
Retained earnings	108,933	104,358
Accumulated other comprehensive income	2,912	6,341
Common stock in treasury, at cost - 680,235 shares	(9,075)	(9,075)
Total Shareholders' Equity	288,757	282,736
Total Liabilities and Shareholders' Equity	$ 353,258	$ 350,807