Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Cash flows from operating activities from continuing operations:
Net income (loss)	$ 13,907	$ (1,515)		$ (4,854)
(Income) loss from discontinued operations, net of tax	(12,102)	(1,932)		595
Income (loss) from continuing operations	1,805	(3,447)	[1]	(4,259)	[1]
Adjustments to reconcile income (loss) from continuing operations to net cash (used in) provided by operating activities:
Depreciation and amortization	1,394	1,203		514
Stock-based compensation expense	3,559	3,017		1,421
Provision for bad debts	38	29		0
Provision for excess and obsolete inventory	120	65		42
Change in provision for returns	(129)	301		350
Gain on sale of non-marketable securities	(4,021)	0		0
Loss (gain) on sale of assets, net	53	(139)		0
Impairment of investments	0	8		0
Changes in assets and liabilities:
Accounts receivable	(322)	14		(292)
Inventories	(7,842)	4,322		(8,084)
Prepaid expenses and other assets	(1,855)	450		346
Accounts payable	5,608	(7,012)		7,557
Deferred revenue	744	2,287		118
Accrued restructuring liabilities	0	0		(1,238)
Accrued liabilities and other	(721)	(93)		233
Other long-term liabilities	(314)	65		209
Net cash (used in) provided by operating activities	(1,883)	1,070		(3,083)
Cash flows from investing activities:
Purchase of property and equipment	(113)	(1,733)		(3,993)
Proceeds from sale of non-marketable equity investment	6,000	0		0
Proceeds from sale of discontinued operations	17,000	0		0
Transaction costs from sale of discontinued operations	(1,100)	0		0
Proceeds from sales of intangible assets, net	0	906		0
Maturities or sales of investments and marketable securities	0	0		10,207
Change in restricted cash	0	0		1,000
Net cash provided by (used in) investing activities	21,787	(827)		7,214
Cash flows from financing activities:
Proceeds from issuance of common stock	355	1,014		1,962
Repurchase of stock	(1,204)	(356)		(157)
Net cash (used in) provided by financing activities	(849)	658		1,805
Cash flows from discontinued operations:
Net cash provided by operating activities	2,395	1,479		28
Net cash (used in) provided by investing activities	(1,066)	(803)		426
Net cash provided by discontinued operations	1,329	676		454
Net increase in cash and cash equivalents	20,384	1,577		6,390
Cash and cash equivalents, beginning of year	36,910	35,333		28,943
Cash and cash equivalents, end of period	$ 57,294	$ 36,910		$ 35,333

[1] Loss from continuing operations, as reported, has been revised to exclude amounts related to the sale of the Company's Media business, which has been presented as discontinued operations.