Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ (4,590)	$ 2,630
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	2,229	1,255
Deferred income tax benefit	(2,703)	(353)
Loss on disposal of property and equipment	29	30
Stock-based compensation	1,138	967
Excess tax benefits from stock-based compensation		(11)
Changes in operating assets and liabilities:
Receivables	4,232	131
Inventories	374	(1,145)
Prepaid income taxes / income taxes payable	296	(97)
Prepaid expenses and other current assets	(194)	3
Trade accounts payable	(468)	(576)
Accrued compensation	(994)	(778)
Other accrued expenses and other current liabilities	(170)	(3)
Deferred income and customer deposits	(1,275)	4,008
Other long-term liabilities	696
Net cash provided by (used in) operating activities	(1,400)	6,061
Cash flows from investing activities:
Purchase of cost method investment		(2,000)
Purchases of marketable securities	(13,253)
Sales and maturities of marketable securities		2,100
Issuances of notes receivable	(500)	(500)
Purchases of property and equipment	(1,399)	(639)
Proceeds from sale of property and equipment	2
Net cash used in investing activities	(15,150)	(1,039)
Cash flows from financing activities:
Repurchases of common stock	(900)
Common stock repurchases to settle employee withholding liability	(28)
Payments of dividends	(3,468)	(950)
Principal payments on capital lease obligations	(9)	(10)
Excess tax benefits from stock-based compensation		11
Proceeds from employee stock plans		204
Net cash used in financing activities	(4,405)	(745)
Effect of exchange rate changes on cash	(107)	232
Net increase (decrease) in cash and cash equivalents	(21,062)	4,509
Cash and cash equivalents, beginning of period	70,161	107,982
Cash and cash equivalents, end of period	49,099	112,491
Supplemental disclosures of net cash paid during the period for:
Income taxes	$ 226	$ 2,057