Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
OPERATING ACTIVITIES:
Net income	$ 4,574	$ 6,750
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,833	1,679
Compensation for stock options and restricted stock units	1,018	773
Provision for bad debts	274	11
Deferred income tax (benefit) expense	1,162	(5)
Decrease (increase) in:
Accounts receivable	7,541	9,254
Inventories, net	(1,299)	(6,432)
Prepaid expenses and other current assets	(2,069)	(1,979)
Income tax benefit from exercise of stock options	(808)	(1,056)
Increase (decrease) in:
Accounts payable and accrued liabilities	(676)	(4,290)
Income taxes payable	(1,658)	(774)
Customer deposits	5	(258)
Unearned service revenues	376	661
Net cash provided by operating activities	10,273	4,334
INVESTING ACTIVITIES:
Purchases of property and equipment	(256)	(703)
Payments for intangible assets	(494)	(193)
Net cash used in investing activities	(750)	(896)
FINANCING ACTIVITIES:
Payments on capital leases	(63)	(131)
Income tax benefit from exercise of stock options	808	1,056
Proceeds from issuance of stock, net	3,049	5,288
Net cash provided by financing activities	3,794	6,213
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(1,952)	(603)
INCREASE IN CASH AND CASH EQUIVALENTS	11,365	9,048
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	93,233	64,540
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 104,598	$ 73,588