Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 7,081	$ 7,958
Short-term investments	15,068	15,141
Trade accounts receivable, net of allowance of $46 and $36, respectively	678	729
Prepaid expenses and other current assets	1,270	1,733
Total current assets	24,097	25,561
Property and equipment, net of accumulated depreciation of $15,394 and $19,187, respectively	5,102	4,507
Acquired intangible assets, net of accumulated amortization of $12,495 and $9,988, respectively	8,425	10,762
Goodwill	1,861	1,861
Total assets	39,485	42,691
Liabilities and Shareholders’ Equity
Accounts payable	984	1,120
Accrued compensation and benefits	3,322	2,599
Accrued expenses and other current liabilities	1,176	2,224
Deferred rent, current portion	249	230
Deferred revenue	1,068	1,056
Total current liabilities	6,799	7,229
Deferred rent, less current portion		249
Other noncurrent liabilities	968	95
Total liabilities	7,767	7,573
Shareholders’ equity and noncontrolling interest:
Preferred stock, par value $0.001 per share, authorized 30,000,000 shares; none issued and outstanding at September 30, 2012 and December 31, 2011, respectively	0	0
Common stock, par value $0.001 per share, stated at amounts paid in; authorized 120,000,000 shares; issued and outstanding 26,393,146 and 25,397,448 shares at September 30, 2012 and December 31, 2011, respectively	77,284	74,073
Accumulated deficit	(45,566)	(38,955)
Total shareholders’ equity	31,718	35,118
Total liabilities and shareholders’ equity	$ 39,485	$ 42,691