Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income (loss)	$ (5,528)	$ (19,416)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of intangible assets	2,531	2,531
Depreciation and amortization of property and equipment	1,569	2,679
Impairment of property and equipment	0	1,841
Change in the fair value of assets held for sale	0	886
Gain on disposal of property and equipment	(5)	(115)
Income tax benefit related to marketable securities	(200)	(89)
Gain on sale of Hungarian subsidiary	0	(760)
Stock-based compensation	3,759	3,630
Amortization of premium on marketable securities	0	2
Bad debt expense	0	53
Changes in operating assets and liabilities:
Accounts receivable, net	(9,738)	2,316
Inventories, net	717	(456)
Prepaid expenses and other current assets	163	(734)
Other assets	29	15
Accounts payable	(3,499)	(1,418)
Accrued compensation	(393)	(1,100)
Other accrued liabilities	(842)	194
Deferred revenue	3,955	5,288
Net cash used in operating activities	(7,482)	(4,653)
Investing activities:
Purchase of property and equipment	(395)	(267)
Proceeds from maturities of marketable securities	0	3,000
Proceeds from sale of Hungarian subsidiary, net of selling costs	0	1,500
Proceeds from the sale of assets held for sale	0	281
Proceeds from sale of property and equipment	5	166
Increase in restricted cash	(75)	0
Net cash provided by (used in) investing activities	(465)	4,680
Financing activities:
Proceeds from exercises of options to purchase common stock	235	180
Taxes paid related to net share settlement of equity awards	(1,812)	(815)
Net cash used in financing activities	(1,577)	(635)
Net decrease in cash and cash equivalents	(9,524)	(608)
Cash and cash equivalents at the beginning of the period	26,487	22,130
Cash and cash equivalents at the end of the period	$ 16,963	$ 21,522