Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net loss	$ (14,854)	$ (22,228)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of intangible assets	1,687	1,687
Depreciation and amortization of property and equipment	2,078	3,541
Impairment of property and equipment	1,841	0
Change in fair value of assets held for sale	755	0
Loss on disposal of property and equipment	(78)	141
Gain on sale of Hungarian subsidiary	(760)	0
Stock-based compensation	2,575	2,735
Amortization of premium (accretion of discount) on marketable securities	2	(48)
Changes in operating assets and liabilities:
Accounts receivable	2,513	5,954
Inventories	(476)	(30)
Prepaid expenses and other current assets	(703)	3,116
Other assets	(238)	(38)
Accounts payable	(631)	(2,108)
Accrued compensation	(1,498)	(160)
Other accrued liabilities	1,002	(3,209)
Deferred revenues	446	87
Net cash used in operating activities	(6,339)	(10,560)
Investing activities:
Purchase of property and equipment	(111)	(641)
Proceeds from maturities of marketable securities	3,000	10,909
Proceeds from sale of Hungarian subsidiary, net of selling costs	1,500	0
Proceeds from the sale of assets held for sale	4	0
Proceeds from sale of property and equipment	187	0
Decrease in restricted cash	0	400
Net cash provided by investing activities	4,580	10,668
Financing activities:
Proceeds from exercises of stock options	62	281
Taxes paid related to net share settlement of equity awards	(343)	0
Net cash provided by (used in) financing activities	(281)	281
Net increase (decrease) in cash and cash equivalents	(2,040)	389
Cash and cash equivalents at the beginning of the period	22,130	32,003
Cash and cash equivalents at the end of the period	$ 20,090	$ 32,392