CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015
Operating Activities:
Net loss	$ (12,467)		$ (21,911)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	530		250
Goodwill impairment	0		14,240
Amortization of premiums and accretion of discounts on investments	244		366
Amortization of intangible assets and other	801		802
Stock-based compensation	1,776		2,229
Changes in assets and liabilities:
Accounts receivable, net	(176)		3,419
Prepaid expenses and other current assets	122		(284)
Other long-term assets	(5)		92
Accounts payable	350		(1,056)
Accrued compensation	(363)		(815)
Other accrued liabilities	(1,534)		993
Other long-term liabilities	(324)		(1,377)
Deferred revenue	444		(551)
Net cash used in operating activities	(10,602)		(3,603)
Investing Activities:
Purchases of property and equipment	(481)		(1,270)
Purchases of investments	(22,901)		(31,668)
Maturities of investments	22,109		39,965
Net cash provided by (used in) investing activities	(1,273)		7,027
Financing Activities:
Proceeds from employee stock purchase plan	45		87
Repurchase of common stock	(72)		(100)
Net cash used in financing activities	(27)		(13)
Effect of exchange rate changes on cash and cash equivalents	35		(178)
Net increase (decrease) in cash and cash equivalents	(11,867)		3,233
Cash and cash equivalents at beginning of period	27,598	[1]	23,354
Cash and cash equivalents at end of period	15,731		26,587
Supplemental schedule of cash flow information:
Income taxes paid	$ 132		$ 149

[1] Derived from the December 31, 2015 audited Consolidated Financial Statements included in our Annual Report on Form 10-K, as filed with the Securities and Exchange Commission ("SEC") on March 7, 2016.