CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Operating activities:
Net income (loss)	$ 7,511		$ (6,722)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	262		404
Amortization of premiums and discounts on investments	442		446
Amortization of purchased technology	62		62
Amortization of intangible assets and other	1,005		1,155
Stock-based compensation	2,434		2,938
Warrant-related charges	383		0
Changes in assets and liabilities:
Accounts receivable, net	(3,955)		649
Prepaid expenses and other current assets	(891)		(533)
Other long-term assets	97		(187)
Accounts payable	795		(507)
Accrued compensation	1,511		646
Other accrued liabilities	(132)		(123)
Other long-term liabilities	181		320
Deferred revenue	(2,263)		849
Net cash provided by (used in) operating activities	7,442		(603)
Investing activities:
Purchases of investments	(43,836)		(33,317)
Maturities of investments	31,046		33,560
Sales of investments	0		2,400
Purchases of property and equipment	(178)		(503)
Acquisition of business, net of cash acquired	0		(1,327)
Net cash provided by (used in) investing activities	(12,968)		813
Financing activities:
Proceeds from issuances of common stock	9,673		1,069
Repurchase of common stock	(4,114)		0
Net cash provided by financing activities	5,559		1,069
Effect of exchange rate changes on cash and cash equivalents	(263)		69
Net increase (decrease) in cash and cash equivalents	(230)		1,348
Cash and cash equivalents at beginning of period	30,852	[1]	22,159
Cash and cash equivalents at end of period	30,622		23,507
Supplemental schedule of cash flow information:
Income taxes paid	$ 97		$ 99

[1] Derived from the December 31, 2012 audited Consolidated Financial Statements included in the Annual Report on Form10-K, as filed with the Securities and Exchange Commission on March 8, 2013.