CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 23,354	$ 28,390
Short-term investments	50,439	43,967
Accounts receivable, less allowance of $2 and $0 at December 31, 2014 and 2013, respectively	14,627	13,993
Prepaid expenses and other current assets	1,403	1,322
Total current assets	89,823	87,672
Property and equipment, net	417	461
Goodwill	14,240	14,240
Intangible assets, net	2,363	3,454
Other assets	1,144	1,072
Total assets	107,987	106,899
Current liabilities:
Accounts payable	1,625	860
Accrued compensation	2,792	2,157
Other accrued liabilities	3,029	3,359
Short-term deferred revenue	2,619	3,323
Total current liabilities	10,065	9,699
Long-term deferred revenue	72	50
Other long-term liabilities	2,129	1,754
Total liabilities	12,266	11,503
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock; par value $0.0001, 150,000,000 shares authorized; 55,457,001 issued and 54,264,483 outstanding at December 31, 2014; 54,474,594 issued and 53,281,996 outstanding at December 31, 2013	5	5
Additional paid-in capital	262,253	258,291
Treasury stock	(5,036)	(5,036)
Accumulated other comprehensive loss	(2,028)	(1,874)
Accumulated deficit	(159,473)	(155,990)
Total stockholders' equity	95,721	95,396
Total liabilities and stockholders' equity	$ 107,987	$ 106,899