Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 4,069	$ 5,045
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,877	1,445
Deferred income tax benefit	(1,688)	252
Loss on disposal of property and equipment	28	5
Stock-based compensation	1,431	1,486
Excess tax benefits from stock-based compensation	(13)	(21)
Changes in operating assets and liabilities:
Receivables	273	(868)
Inventories	(1,053)	(1,480)
Prepaid income taxes/income taxes payable	1,263	(226)
Prepaid expenses and other current assets	(525)	124
Trade accounts payable	(1,314)	1,454
Accrued compensation	(221)	(203)
Other accrued expenses and other current liabilities	1	(321)
Deferred income and customer deposits	3,888	(646)
Net cash provided by operating activities	8,016	6,046
Cash flows from investing activities:
Purchase of stock in software company	(2,000)
Maturities and sales of marketable securities	2,100	21,013
Issuance of note receivable	(500)
Purchases of property and equipment	(738)	(3,817)
Net cash provided by (used in) investing activities	(1,138)	17,196
Cash flows from financing activities:
Repurchase of common stock	(4,161)
Payment of dividends	(2,845)
Contribution from noncontrolling interest		588
Proceeds from stock option exercises	215	536
Principal payments on capital lease obligations	(15)	(14)
Excess tax benefits from stock-based compensation	13	21
Net cash provided by (used in) financing activities	(6,793)	1,131
Effect of exchange rate changes on cash	127	(1)
Net increase in cash and cash equivalents	212	24,372
Cash and cash equivalents, beginning of period	107,982	72,507
Cash and cash equivalents, end of period	108,194	96,879
Supplemental disclosures of net cash paid during the period for:
Income taxes	$ 2,936	$ 3,014