CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Operating activities:
Net income (loss)	$ 1,882		$ (4,373)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	97		132
Amortization of premiums and discounts on investments	156		139
Amortization of purchased technology	21		20
Amortization of intangible assets and other	335		367
Stock-based compensation expense	796		995
Changes in assets and liabilities:
Accounts receivable, net	(469)		1,428
Prepaid expenses and other current assets	(388)		(355)
Other long-term assets	36		(199)
Accounts payable	621		(531)
Accrued compensation	744		1,057
Other accrued liabilities	815		860
Other long-term liabilities	74		49
Deferred revenue	(368)		46
Net cash provided by (used in) operating activities	4,352		(365)
Investing activities:
Purchases of property and equipment	(38)		(70)
Acquisition of business	0		(1,327)
Purchases of investments	(10,874)		(15,161)
Maturities of investments	6,481		13,895
Net cash used in investing activities	(4,431)		(2,663)
Financing activities:
Proceeds from issuances of common stock	3,094		261
Repurchase of common stock	(4,114)		0
Net cash provided by (used in) financing activities	(1,020)		261
Net decrease in cash and cash equivalents	(1,099)		(2,767)
Effect of exchange rate changes on cash and cash equivalents	0		88
Cash and cash equivalents at beginning of period	30,852	[1]	22,159
Cash and cash equivalents at end of period	29,753		19,480
Supplemental schedule of cash flow information:
Income taxes paid	$ 17		$ 104

[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.