Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (6,053)	$ (4,590)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	1,602	2,229
Deferred income tax expense (benefit)	672	(2,703)
Loss on disposal of property and equipment	20	29
Stock-based compensation	991	1,138
Changes in operating assets and liabilities:
Receivables	918	4,232
Inventories	758	374
Prepaid income taxes / income taxes payable	320	296
Prepaid expenses and other assets	(134)	(194)
Trade accounts payable	(602)	(468)
Accrued compensation	54	(994)
Other accrued expenses and other current liabilities	18	(170)
Deferred revenue	(1,395)	(1,275)
Other long-term liabilities	(57)	696
Net cash used in operating activities	(2,888)	(1,400)
Cash flows from investing activities:
Purchase of cost method investment	(350)	0
Purchases of marketable securities	(15,505)	(13,253)
Sales and maturities of marketable securities	20,750	0
Issuances of notes receivable	0	(500)
Purchases of property and equipment	(572)	(1,399)
Proceeds from sale of property and equipment	0	2
Net cash provided by (used in) investing activities	4,323	(15,150)
Cash flows from financing activities:
Payments for Repurchase of Common Stock	0	(900)
Common stock repurchases to settle employee withholding liability	(47)	(28)
Payments of dividends	0	(3,468)
Principal payments on capital lease obligations	(11)	(9)
Net cash used in financing activities	(58)	(4,405)
Effect of exchange rate changes on cash	(203)	(107)
Net increase (decrease) in cash and cash equivalents	1,174	(21,062)
Cash and cash equivalents, beginning of period	28,644	70,161
Cash and cash equivalents, end of period	29,818	49,099
Supplemental disclosures of net cash paid (received) during the period for:
Income taxes	$ (999)	$ 226