CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income (loss)	$ (482)	$ 1,882
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	72	97
Amortization of premiums and discounts on investments	239	156
Amortization of purchased technology	0	21
Amortization of intangible assets and other	273	335
Stock-based compensation	622	796
Changes in assets and liabilities:
Accounts receivable, net	1,978	(469)
Prepaid expenses and other current assets	21	(388)
Other long-term assets	(28)	36
Accounts payable	237	621
Accrued compensation	1,078	744
Other accrued liabilities	(395)	815
Other long-term liabilities	84	74
Deferred revenue	(338)	(368)
Net cash provided by operating activities	3,361	4,352
Investing activities:
Purchases of property and equipment	(34)	(38)
Purchases of investments	(15,312)	(10,874)
Maturities of investments	15,108	6,481
Net cash used in investing activities	(238)	(4,431)
Financing activities:
Proceeds from issuances of common stock	59	3,094
Repurchase of common stock	0	(4,114)
Net cash provided by (used in) financing activities	59	(1,020)
Effect of exchange rate changes on cash and cash equivalents	37	0
Net increase (decrease) in cash and cash equivalents	3,219	(1,099)
Cash and cash equivalents at beginning of period	28,390	30,852
Cash and cash equivalents at end of period	31,609	29,753
Supplemental schedule of cash flow information:
Income taxes paid	$ 60	$ 17