Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 42,118	$ 34,885
Short-term investments	58,748	83,547
Accounts receivable, net of allowance of $381 and $331 at September 30, 2013 and December 31, 2012, respectively	25,022	24,545
Prepaid expenses and other current assets	5,116	4,377
Total current assets	131,004	147,354
Restricted cash	0	114
Long-term investments	24,805	0
Property and equipment, net	22,493	18,148
Intangible assets, net	2,492	2,811
Goodwill	317	317
Other noncurrent assets	564	1,574
Total assets	181,675	170,318
Current liabilities:
Accounts payable	1,097	2,031
Accrued liabilities	7,950	7,803
Deferred revenues, current	61,389	56,497
Capital lease obligations, current	1,071	1,183
Total current liabilities	71,507	67,514
Deferred revenues, noncurrent	8,456	8,616
Income taxes payable, noncurrent	684	594
Other noncurrent liabilities	533	1,231
Capital lease obligations, noncurrent	0	808
Total liabilities	81,180	78,763
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.001 par value; 20,000,000 shares authorized, no shares issued and outstanding at September 30, 2013 and December 31, 2012	0	0
Common stock, $0.001 par value; 1,000,000,000 shares authorized, 32,237,969 and 31,420,028 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	32	31
Additional paid-in capital	174,056	166,651
Accumulated other comprehensive loss	(1,080)	(1,035)
Accumulated deficit	(72,513)	(74,092)
Total stockholders’ equity	100,495	91,555
Total liabilities and stockholders’ equity	$ 181,675	$ 170,318