Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities from continuing operations:
Net loss	$ (2,245)	$ (2,336)
Loss from discontinued operations, net of tax	0	28
Loss from continuing operations	(2,245)	(2,308)
Adjustments to reconcile loss from continuing operations to net cash used in operating activities:
Depreciation expense	313	316
Stock-based compensation expense	180	657
Provision for bad debts	(5)	(3)
Inventory write-downs	18	85
Changes in assets and liabilities:
Accounts receivable	5,048	(187)
Inventories	(1,712)	1,440
Prepaid expenses and other assets	1,725	1,289
Accounts payable	(7,479)	(4,804)
Deferred revenue	(470)	(459)
Accrued and other liabilities	(4,000)	(1,969)
Other long-term liabilities	0	(14)
Net cash used in operating activities	(8,627)	(5,957)
Cash flows from investing activities:
Purchase of property and equipment	0	(11)
Net cash used in investing activities	0	(11)
Cash flows from financing activities:
Proceeds from issuance of common stock	19	112
Repurchase of stock	(200)	(421)
Net cash used in financing activities	(181)	(309)
Net change in cash and cash equivalents	(8,808)	(6,277)
Cash and cash equivalents, beginning of year	53,084	57,294
Cash and cash equivalents, end of period	$ 44,276	$ 51,017