Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 2,630	$ 2,748
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,255	917
Deferred income tax benefit	(353)	(72)
Loss on disposal of property and equipment	30	1
Stock-based compensation	967	1,002
Excess tax benefits from stock-based compensation	(11)	(22)
Changes in operating assets and liabilities:
Receivables	131	(716)
Inventories	(1,145)	(2,886)
Prepaid income taxes/income taxes payable	(97)	196
Prepaid expenses and other current assets	3	(319)
Trade accounts payable	(576)	2,658
Accrued compensation	(778)	(1,183)
Other accrued expenses and other current liabilities	(3)	(77)
Deferred income and customer deposits	4,008	(1,086)
Net cash provided by operating activities	6,061	1,161
Cash flows from investing activities:
Purchase of stock in software company	(2,000)
Maturities and sales of marketable securities	2,100	19,954
Issuance of note receivable	(500)
Purchases of property and equipment	(639)	(3,361)
Net cash provided by (used in) investing activities	(1,039)	16,593
Cash flows from financing activities:
Payment of dividends	(950)
Principal payments on capital lease obligations	(10)	(9)
Excess tax benefits from stock-based compensation	11	22
Proceeds from stock option exercises	204	536
Net cash provided by (used in) financing activities	(745)	549
Effect of exchange rate changes on cash	232	(201)
Net increase in cash and cash equivalents	4,509	18,102
Cash and cash equivalents, beginning of period	107,982	72,507
Cash and cash equivalents, end of period	112,491	90,609
Supplemental disclosures of net cash paid during the period for:
Income taxes	$ 2,057	$ 1,520