Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 80,505	$ 64,540
Short-term investments	64,989	64,997
Accounts receivable, net	51,014	57,512
Inventories, net	53,348	49,934
Deferred income taxes, net	6,090	5,297
Prepaid expenses and other current assets	10,383	9,207
Total current assets	266,329	251,487
Property and Equipment:
Machinery and equipment	31,427	29,171
Furniture and fixtures	6,406	5,963
Leasehold improvements	10,780	10,233
Property and equipment at cost	48,613	45,367
Less: accumulated depreciation and amortization	(32,776)	(29,134)
Property and equipment, net	15,837	16,233
Goodwill	18,517	18,610
Intangible assets, net	6,727	6,849
Service inventory	19,535	17,316
Deferred income taxes, net	2,270	2,296
Total Assets	329,215	312,791
Current Liabilities:
Accounts payable	7,995	13,396
Accrued liabilities	16,242	18,076
Income taxes payable	1,611	2,682
Current portion of unearned service revenues	17,163	15,638
Customer deposits	2,347	4,072
Current portion of obligations under capital leases	18	84
Total current liabilities	45,376	53,948
Unearned service revenues - less current portion	9,648	9,540
Deferred tax liability, net	1,259	1,148
Obligations under capital leases - less current portion	66	257
Total Liabilities	56,349	64,893
Commitments and contingencies - See Note Q
Shareholders' Equity:
Common stock - par value $.001, 50,000,000 shares authorized; 17,651,780 and 17,381,110 issued; 16,971,545 and 16,700,875 outstanding, respectively	18	17
Additional paid-in-capital	179,975	169,780
Retained earnings	96,519	81,360
Accumulated other comprehensive income	5,429	5,816
Common stock in treasury, at cost - 680,235 shares	(9,075)	(9,075)
Total Shareholders' Equity	272,866	247,898
Total Liabilities and Shareholders' Equity	$ 329,215	$ 312,791