Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
OPERATING ACTIVITIES:
Net income	$ 4,976	$ 4,574
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	1,847	1,833
Compensation for stock options and restricted stock units	1,246	1,018
(Net recovery of) provision for bad debts	(120)	274
Deferred income tax (benefit) expense	(410)	1,162
Decrease (increase) in:
Accounts receivable	1,869	7,541
Inventories, net	(2,541)	(1,299)
Prepaid expenses and other current assets	(539)	(2,069)
Income tax benefit from exercise of stock options	(58)	(808)
(Decrease) increase in:
Accounts payable and accrued liabilities	(6,103)	(676)
Income taxes payable	(1,619)	(1,658)
Customer deposits	(645)	5
Unearned service revenues	1,274	376
Net cash (used in) provided by operating activities	(823)	10,273
INVESTING ACTIVITIES:
Purchases of property and equipment	(2,124)	(256)
Payments for intangible assets	(419)	(494)
Net cash used in investing activities	(2,543)	(750)
FINANCING ACTIVITIES:
Payments on capital leases	(50)	(63)
Income tax benefit from exercise of stock options	58	808
Proceeds from issuance of stock, net	1,619	3,049
Net cash provided by financing activities	1,627	3,794
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(175)	(1,952)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(1,914)	11,365
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	124,630	93,233
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 122,716	$ 104,598