Consolidated Balance Sheets (USD $) In Thousands	Oct. 01, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 54,345	$ 50,722
Short-term investments	64,995	64,986
Accounts receivable, net	50,670	51,862
Inventories, net	49,299	28,242
Deferred income taxes, net	4,349	4,455
Prepaid expenses and other current assets	10,713	8,045
Total current assets	234,371	208,312
Property and Equipment:
Machinery and equipment	28,217	24,840
Furniture and fixtures	6,005	5,700
Leasehold improvements	10,151	9,682
Property and equipment at cost	44,373	40,222
Less: accumulated depreciation and amortization	(28,298)	(24,982)
Property and equipment, net	16,075	15,240
Goodwill	18,998	19,015
Intangible assets, net	6,978	7,204
Service inventory	15,683	13,726
Deferred income taxes, net	2,520	2,522
Total Assets	294,625	266,019
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	11,647	12,025
Accrued liabilities	16,633	15,208
Income taxes payable	391	1,138
Current portion of unearned service revenues	15,010	13,357
Customer deposits	2,490	3,679
Current portion of obligations under capital leases	25	91
Total current liabilities	46,196	45,498
Unearned service revenues - less current portion	8,785	6,758
Deferred tax liability, net	1,160	1,161
Obligations under capital leases - less current portion	156	125
Total Liabilities	56,297	53,542
Commitments and contingencies - See Note R
Shareholders' Equity:
Common stock - par value $.001, 50,000,000 shares authorized; 17,306,911 and 16,894,374 issued; 16,626,676 and 16,214,139 outstanding, respectively	17	17
Additional paid-in-capital	167,491	156,310
Retained earnings	71,889	57,983
Accumulated other comprehensive income	8,006	7,242
Common stock in treasury, at cost - 680,235 shares	(9,075)	(9,075)
Total Shareholders' Equity	238,328	212,477
Total Liabilities and Shareholders' Equity	$ 294,625	$ 266,019